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30406141 = 67453823
BaseRepresentation
bin111001111111…
…1010111111101
32010012210101101
41303333113331
530240444031
63003413101
7516306433
oct163772775
963183341
1030406141
1116188647
12a224191
1363b7acc
144076d53
152a09361
hex1cff5fd

30406141 has 4 divisors (see below), whose sum is σ = 30860032. Its totient is φ = 29952252.

The previous prime is 30406139. The next prime is 30406147. The reversal of 30406141 is 14160403.

It is a happy number.

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: 14160403 = 33742019.

It is a cyclic number.

It is not a de Polignac number, because 30406141 - 21 = 30406139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30406147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226845 + ... + 226978.

It is an arithmetic number, because the mean of its divisors is an integer number (7715008).

Almost surely, 230406141 is an apocalyptic number.

It is an amenable number.

30406141 is a deficient number, since it is larger than the sum of its proper divisors (453891).

30406141 is an equidigital number, since it uses as much as digits as its factorization.

30406141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453890.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 30406141 is about 5514.1763664214. The cubic root of 30406141 is about 312.1191640199.

Adding to 30406141 its reverse (14160403), we get a palindrome (44566544).

The spelling of 30406141 in words is "thirty million, four hundred six thousand, one hundred forty-one".

Divisors: 1 67 453823 30406141