234538521 has 16 divisors (see below), whose sum is σ = 372931584. Its totient is φ = 128194704.

The previous prime is 234538517. The next prime is 234538537. The reversal of 234538521 is 125835432.

It is not a de Polignac number, because 234538521 - 2² = 234538517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (234538541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242311 + ... + 243276.

It is an arithmetic number, because the mean of its divisors is an integer number (23308224).

Almost surely, 2^234538521 is an apocalyptic number.

234538521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

234538521 is a deficient number, since it is larger than the sum of its proper divisors (138393063).

234538521 is a wasteful number, since it uses less digits than its factorization.

234538521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485620.

The product of its digits is 28800, while the sum is 33.

The square root of 234538521 is about 15314.6505347004. The cubic root of 234538521 is about 616.6963727918.

The spelling of 234538521 in words is "two hundred thirty-four million, five hundred thirty-eight thousand, five hundred twenty-one".