231525251 has 2 divisors, whose sum is σ = 231525252. Its totient is φ = 231525250.

The previous prime is 231525197. The next prime is 231525271. The reversal of 231525251 is 152525132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231525251 - 2²² = 227330947 is a prime.

It is a super-2 number, since 2×231525251² = 107207883701226002, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 231525251.

It is not a weakly prime, because it can be changed into another prime (231525271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115762625 + 115762626.

It is an arithmetic number, because the mean of its divisors is an integer number (115762626).

Almost surely, 2^231525251 is an apocalyptic number.

231525251 is a deficient number, since it is larger than the sum of its proper divisors (1).

231525251 is an equidigital number, since it uses as much as digits as its factorization.

231525251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 231525251 is about 15215.9538314231. The cubic root of 231525251 is about 614.0439469229.

The spelling of 231525251 in words is "two hundred thirty-one million, five hundred twenty-five thousand, two hundred fifty-one".