234256509 has 32 divisors (see below), whose sum is σ = 358343040. Its totient is φ = 151134336.

The previous prime is 234256501. The next prime is 234256511. The reversal of 234256509 is 905652432.

It is not a de Polignac number, because 234256509 - 2³ = 234256501 is a prime.

It is a super-2 number, since 2×234256509² = 109752224017734162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234256501) 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 31 ways as a sum of consecutive naturals, for example, 226257 + ... + 227289.

It is an arithmetic number, because the mean of its divisors is an integer number (11198220).

Almost surely, 2^234256509 is an apocalyptic number.

It is an amenable number.

234256509 is a deficient number, since it is larger than the sum of its proper divisors (124086531).

234256509 is a wasteful number, since it uses less digits than its factorization.

234256509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 234256509 is about 15305.4405032982. The cubic root of 234256509 is about 616.4490992246.

The spelling of 234256509 in words is "two hundred thirty-four million, two hundred fifty-six thousand, five hundred nine".