231525441 has 18 divisors (see below), whose sum is σ = 389026482. Its totient is φ = 132300000.

The previous prime is 231525433. The next prime is 231525443. The reversal of 231525441 is 144525132.

It can be written as a sum of positive squares in only one way, i.e., 192099600 + 39425841 = 13860^2 + 6279^2 .

It is not a de Polignac number, because 231525441 - 2³ = 231525433 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (231525443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 262060 + ... + 262941.

Almost surely, 2^231525441 is an apocalyptic number.

231525441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231525441 is a deficient number, since it is larger than the sum of its proper divisors (157501041).

231525441 is a wasteful number, since it uses less digits than its factorization.

231525441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525021 (or 525011 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 231525441 is about 15215.9600748688. The cubic root of 231525441 is about 614.0441148935.

The spelling of 231525441 in words is "two hundred thirty-one million, five hundred twenty-five thousand, four hundred forty-one".