25540531 has 2 divisors, whose sum is σ = 25540532. Its totient is φ = 25540530.

The previous prime is 25540523. The next prime is 25540547. The reversal of 25540531 is 13504552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25540531 - 2³ = 25540523 is a prime.

It is a super-2 number, since 2×25540531² = 1304637447523922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25540496 and 25540505.

It is not a weakly prime, because it can be changed into another prime (25540591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770265 + 12770266.

It is an arithmetic number, because the mean of its divisors is an integer number (12770266).

Almost surely, 2^25540531 is an apocalyptic number.

25540531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25540531 is an equidigital number, since it uses as much as digits as its factorization.

25540531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 25540531 is about 5053.7640427705. The cubic root of 25540531 is about 294.4941287096.

The spelling of 25540531 in words is "twenty-five million, five hundred forty thousand, five hundred thirty-one".