231545425 has 24 divisors (see below), whose sum is σ = 298072440. Its totient is φ = 178214400.

The previous prime is 231545407. The next prime is 231545459. The reversal of 231545425 is 524545132.

231545425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 163251729 + 68293696 = 12777^2 + 8264^2 .

It is not a de Polignac number, because 231545425 - 2¹⁹ = 231021137 is a prime.

It is a super-2 number, since 2×231545425² = 107226567676861250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 377419 + ... + 378031.

It is an arithmetic number, because the mean of its divisors is an integer number (12419685).

Almost surely, 2^231545425 is an apocalyptic number.

231545425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231545425 is a deficient number, since it is larger than the sum of its proper divisors (66527015).

231545425 is a wasteful number, since it uses less digits than its factorization.

231545425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1168 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 231545425 is about 15216.6167396041. The cubic root of 231545425 is about 614.0617813531.

The spelling of 231545425 in words is "two hundred thirty-one million, five hundred forty-five thousand, four hundred twenty-five".