25981051 has 2 divisors, whose sum is σ = 25981052. Its totient is φ = 25981050.

The previous prime is 25981019. The next prime is 25981057. The reversal of 25981051 is 15018952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25981051 - 2⁵ = 25981019 is a prime.

It is a super-2 number, since 2×25981051² = 1350030022129202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25981057) 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, 12990525 + 12990526.

It is an arithmetic number, because the mean of its divisors is an integer number (12990526).

Almost surely, 2^25981051 is an apocalyptic number.

25981051 is a deficient number, since it is larger than the sum of its proper divisors (1).

25981051 is an equidigital number, since it uses as much as digits as its factorization.

25981051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 25981051 is about 5097.1610725972. The cubic root of 25981051 is about 296.1776196855.

The spelling of 25981051 in words is "twenty-five million, nine hundred eighty-one thousand, fifty-one".