25546531 has 2 divisors, whose sum is σ = 25546532. Its totient is φ = 25546530.

The previous prime is 25546523. The next prime is 25546589. The reversal of 25546531 is 13564552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25546531 - 2³ = 25546523 is a prime.

It is a super-2 number, since 2×25546531² = 1305250492267922, 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 = 25546493 and 25546502.

It is not a weakly prime, because it can be changed into another prime (25546231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12773265 + 12773266.

It is an arithmetic number, because the mean of its divisors is an integer number (12773266).

Almost surely, 2^25546531 is an apocalyptic number.

25546531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25546531 is an equidigital number, since it uses as much as digits as its factorization.

25546531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 25546531 is about 5054.3576248619. The cubic root of 25546531 is about 294.5171878285.

The spelling of 25546531 in words is "twenty-five million, five hundred forty-six thousand, five hundred thirty-one".