525565531 has 2 divisors, whose sum is σ = 525565532. Its totient is φ = 525565530.

The previous prime is 525565493. The next prime is 525565553. The reversal of 525565531 is 135565525.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525565531 is a prime.

It is a super-2 number, since 2×525565531² = 552438254750623922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (525565561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262782765 + 262782766.

It is an arithmetic number, because the mean of its divisors is an integer number (262782766).

Almost surely, 2^525565531 is an apocalyptic number.

525565531 is a deficient number, since it is larger than the sum of its proper divisors (1).

525565531 is an equidigital number, since it uses as much as digits as its factorization.

525565531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112500, while the sum is 37.

The square root of 525565531 is about 22925.2160513265. The cubic root of 525565531 is about 807.0038838005.

The spelling of 525565531 in words is "five hundred twenty-five million, five hundred sixty-five thousand, five hundred thirty-one".