6404525231 has 8 divisors (see below), whose sum is σ = 6937995120. Its totient is φ = 5911867416.

The previous prime is 6404525227. The next prime is 6404525233. The reversal of 6404525231 is 1325254046.

It is not a de Polignac number, because 6404525231 - 2² = 6404525227 is a prime.

It is a super-2 number, since 2×6404525231² = 82035886869031206722, which 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 (6404525233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455365 + ... + 1459758.

It is an arithmetic number, because the mean of its divisors is an integer number (867249390).

Almost surely, 2^6404525231 is an apocalyptic number.

6404525231 is a deficient number, since it is larger than the sum of its proper divisors (533469889).

6404525231 is an equidigital number, since it uses as much as digits as its factorization.

6404525231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915162 (or 2915136 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 6404525231 is about 80028.2776960744. The cubic root of 6404525231 is about 1857.0730191357.

Adding to 6404525231 its reverse (1325254046), we get a palindrome (7729779277).

The spelling of 6404525231 in words is "six billion, four hundred four million, five hundred twenty-five thousand, two hundred thirty-one".