25275139031 has 4 divisors (see below), whose sum is σ = 25275814200. Its totient is φ = 25274463864.

The previous prime is 25275138901. The next prime is 25275139049. The reversal of 25275139031 is 13093157252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25275139031 is a prime.

It is a super-2 number, since 2×25275139031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25275139531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277916 + ... + 357473.

It is an arithmetic number, because the mean of its divisors is an integer number (6318953550).

Almost surely, 2^25275139031 is an apocalyptic number.

25275139031 is a deficient number, since it is larger than the sum of its proper divisors (675169).

25275139031 is an equidigital number, since it uses as much as digits as its factorization.

25275139031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675168.

The product of its (nonzero) digits is 56700, while the sum is 38.

The spelling of 25275139031 in words is "twenty-five billion, two hundred seventy-five million, one hundred thirty-nine thousand, thirty-one".