2531569 has 2 divisors, whose sum is σ = 2531570. Its totient is φ = 2531568.

The previous prime is 2531563. The next prime is 2531593. The reversal of 2531569 is 9651352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 97969 = 1560^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531569 - 2⁵ = 2531537 is a prime.

It is a super-2 number, since 2×2531569² = 12817683203522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2531569.

It is not a weakly prime, because it can be changed into another prime (2531563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265784 + 1265785.

It is an arithmetic number, because the mean of its divisors is an integer number (1265785).

2^2531569 is an apocalyptic number.

It is an amenable number.

2531569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531569 is an equidigital number, since it uses as much as digits as its factorization.

2531569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

The square root of 2531569 is about 1591.0905065395. The cubic root of 2531569 is about 136.2897692735.

The spelling of 2531569 in words is "two million, five hundred thirty-one thousand, five hundred sixty-nine".