25427485931 has 4 divisors (see below), whose sum is σ = 25431594000. Its totient is φ = 25423377864.

The previous prime is 25427485901. The next prime is 25427485943. The reversal of 25427485931 is 13958472452.

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

It is a cyclic number.

It is not a de Polignac number, because 25427485931 - 2¹⁴ = 25427469547 is a prime.

It is a super-2 number, since 2×25427485931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25427485931.

It is not an unprimeable number, because it can be changed into a prime (25427485901) 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, 2044736 + ... + 2057133.

It is an arithmetic number, because the mean of its divisors is an integer number (6357898500).

Almost surely, 2^25427485931 is an apocalyptic number.

25427485931 is a deficient number, since it is larger than the sum of its proper divisors (4108069).

25427485931 is an equidigital number, since it uses as much as digits as its factorization.

25427485931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108068.

The product of its digits is 2419200, while the sum is 50.

The spelling of 25427485931 in words is "twenty-five billion, four hundred twenty-seven million, four hundred eighty-five thousand, nine hundred thirty-one".