25245520131 has 16 divisors (see below), whose sum is σ = 36255008160. Its totient is φ = 15533548800.

The previous prime is 25245520067. The next prime is 25245520147. The reversal of 25245520131 is 13102554252.

It is not a de Polignac number, because 25245520131 - 2⁶ = 25245520067 is a prime.

It is a super-2 number, since 2×25245520131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25245520151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267175 + ... + 349103.

It is an arithmetic number, because the mean of its divisors is an integer number (2265938010).

Almost surely, 2^25245520131 is an apocalyptic number.

25245520131 is a deficient number, since it is larger than the sum of its proper divisors (11009488029).

25245520131 is a wasteful number, since it uses less digits than its factorization.

25245520131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89846.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 25245520131 in words is "twenty-five billion, two hundred forty-five million, five hundred twenty thousand, one hundred thirty-one".