231553251 has 6 divisors (see below), whose sum is σ = 334465820. Its totient is φ = 154368828.

The previous prime is 231553241. The next prime is 231553271. The reversal of 231553251 is 152355132.

It is a happy number.

It is not a de Polignac number, because 231553251 - 2⁵ = 231553219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231553211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12864061 + ... + 12864078.

Almost surely, 2^231553251 is an apocalyptic number.

231553251 is a deficient number, since it is larger than the sum of its proper divisors (102912569).

231553251 is a wasteful number, since it uses less digits than its factorization.

231553251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25728145 (or 25728142 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 231553251 is about 15216.8738905204. The cubic root of 231553251 is about 614.0686994965.

The spelling of 231553251 in words is "two hundred thirty-one million, five hundred fifty-three thousand, two hundred fifty-one".