25231500401 has 4 divisors (see below), whose sum is σ = 25231830000. Its totient is φ = 25231170804.

The previous prime is 25231500389. The next prime is 25231500407. The reversal of 25231500401 is 10400513252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25231500401 is a prime.

It is a super-2 number, since 2×25231500401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25231500407) 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, 16550 + ... + 225248.

It is an arithmetic number, because the mean of its divisors is an integer number (6307957500).

Almost surely, 2^25231500401 is an apocalyptic number.

It is an amenable number.

25231500401 is a deficient number, since it is larger than the sum of its proper divisors (329599).

25231500401 is a wasteful number, since it uses less digits than its factorization.

25231500401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329598.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 25231500401 in words is "twenty-five billion, two hundred thirty-one million, five hundred thousand, four hundred one".