165056431 has 8 divisors (see below), whose sum is σ = 172717184. Its totient is φ = 157541760.

The previous prime is 165056407. The next prime is 165056459. The reversal of 165056431 is 134650561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165056431 is a prime.

It is a super-2 number, since 2×165056431² = 54487250828915522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165056393 and 165056402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165056471) 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, 34206 + ... + 38731.

It is an arithmetic number, because the mean of its divisors is an integer number (21589648).

Almost surely, 2^165056431 is an apocalyptic number.

165056431 is a deficient number, since it is larger than the sum of its proper divisors (7660753).

165056431 is an equidigital number, since it uses as much as digits as its factorization.

165056431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73041.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 165056431 is about 12847.4289645828. The cubic root of 165056431 is about 548.5431760190.

It can be divided in two parts, 1650 and 56431, that added together give a square (58081 = 241²).

The spelling of 165056431 in words is "one hundred sixty-five million, fifty-six thousand, four hundred thirty-one".