25700531 has 2 divisors, whose sum is σ = 25700532. Its totient is φ = 25700530.

The previous prime is 25700513. The next prime is 25700551. The reversal of 25700531 is 13500752.

Together with previous prime (25700513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25700531 is a prime.

It is a super-2 number, since 2×25700531² = 1321034587363922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25700497 and 25700506.

It is not a weakly prime, because it can be changed into another prime (25700501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12850265 + 12850266.

It is an arithmetic number, because the mean of its divisors is an integer number (12850266).

Almost surely, 2^25700531 is an apocalyptic number.

25700531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25700531 is an equidigital number, since it uses as much as digits as its factorization.

25700531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 25700531 is about 5069.5691138400. The cubic root of 25700531 is about 295.1078070017.

The spelling of 25700531 in words is "twenty-five million, seven hundred thousand, five hundred thirty-one".