525131531 has 2 divisors, whose sum is σ = 525131532. Its totient is φ = 525131530.

The previous prime is 525131501. The next prime is 525131533. The reversal of 525131531 is 135131525.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525131531 is a prime.

It is a super-2 number, since 2×525131531² = 551526249700807922, which contains 22 as substring.

Together with 525131533, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_27608210 and since 525131531 and 27608210 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 525131531.

It is not a weakly prime, because it can be changed into another prime (525131533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262565765 + 262565766.

It is an arithmetic number, because the mean of its divisors is an integer number (262565766).

Almost surely, 2^525131531 is an apocalyptic number.

525131531 is a deficient number, since it is larger than the sum of its proper divisors (1).

525131531 is an equidigital number, since it uses as much as digits as its factorization.

525131531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 26.

The square root of 525131531 is about 22915.7485367596. The cubic root of 525131531 is about 806.7816875085.

The spelling of 525131531 in words is "five hundred twenty-five million, one hundred thirty-one thousand, five hundred thirty-one".