165256434 has 24 divisors (see below), whose sum is σ = 409206720. Its totient is φ = 47216088.

The previous prime is 165256423. The next prime is 165256459. The reversal of 165256434 is 434652561.

165256434 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 5 + 643 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655654 + ... + 655905.

It is an arithmetic number, because the mean of its divisors is an integer number (17050280).

Almost surely, 2^165256434 is an apocalyptic number.

165256434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

165256434 is an abundant number, since it is smaller than the sum of its proper divisors (243950286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165256434 is a wasteful number, since it uses less digits than its factorization.

165256434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311574 (or 1311571 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 165256434 is about 12855.2103833426. The cubic root of 165256434 is about 548.7646477446.

The spelling of 165256434 in words is "one hundred sixty-five million, two hundred fifty-six thousand, four hundred thirty-four".