Search a number
-
+
123020231 = 1923927091
BaseRepresentation
bin1110101010100…
…10001111000111
322120111002000212
413111102033013
5222443121411
620112430035
73022440365
oct725221707
9276432025
10123020231
1163494a14
123524831b
131c643849
14124a4635
15ac0068b
hex75523c7

123020231 has 8 divisors (see below), whose sum is σ = 130041600. Its totient is φ = 116053560.

The previous prime is 123020221. The next prime is 123020239. The reversal of 123020231 is 132020321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123020231 - 26 = 123020167 is a prime.

It is a super-2 number, since 2×1230202312 = 30267954470586722, 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 (123020239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9005 + ... + 18086.

It is an arithmetic number, because the mean of its divisors is an integer number (16255200).

Almost surely, 2123020231 is an apocalyptic number.

123020231 is a deficient number, since it is larger than the sum of its proper divisors (7021369).

123020231 is a wasteful number, since it uses less digits than its factorization.

123020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27349.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123020231 is about 11091.4485528266. The cubic root of 123020231 is about 497.3462481203.

Adding to 123020231 its reverse (132020321), we get a palindrome (255040552).

The spelling of 123020231 in words is "one hundred twenty-three million, twenty thousand, two hundred thirty-one".

Divisors: 1 19 239 4541 27091 514729 6474749 123020231