Search a number
-
+
100124381 = 714303483
BaseRepresentation
bin1011111011111…
…00011011011101
320222101211211102
411331330123131
5201112440011
613534002445
72324020550
oct575743335
9228354742
10100124381
1151576a25
1229646425
13179882c6
14d424697
158bcb73b
hex5f7c6dd

100124381 has 4 divisors (see below), whose sum is σ = 114427872. Its totient is φ = 85820892.

The previous prime is 100124369. The next prime is 100124383. The reversal of 100124381 is 183421001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183421001 = 1731060237.

It is a cyclic number.

It is not a de Polignac number, because 100124381 - 222 = 95930077 is a prime.

It is a super-2 number, since 2×1001243812 = 20049783341266322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100124383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7151735 + ... + 7151748.

It is an arithmetic number, because the mean of its divisors is an integer number (28606968).

Almost surely, 2100124381 is an apocalyptic number.

It is an amenable number.

100124381 is a deficient number, since it is larger than the sum of its proper divisors (14303491).

100124381 is an equidigital number, since it uses as much as digits as its factorization.

100124381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14303490.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 100124381 is about 10006.2171173726. The cubic root of 100124381 is about 464.3512454496.

Adding to 100124381 its reverse (183421001), we get a palindrome (283545382).

The spelling of 100124381 in words is "one hundred million, one hundred twenty-four thousand, three hundred eighty-one".

Divisors: 1 7 14303483 100124381