6403231305 has 128 divisors (see below), whose sum is σ = 12496343040. Its totient is φ = 3098234880.

The previous prime is 6403231301. The next prime is 6403231327. The reversal of 6403231305 is 5031323046.

It is a happy number.

6403231305 is a `hidden beast` number, since 640 + 3 + 2 + 3 + 13 + 0 + 5 = 666.

It is not a de Polignac number, because 6403231305 - 2² = 6403231301 is a prime.

It is a super-2 number, since 2×6403231305² = 82002742290664006050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6403231301) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7419304 + ... + 7420166.

It is an arithmetic number, because the mean of its divisors is an integer number (97627680).

Almost surely, 2^6403231305 is an apocalyptic number.

It is an amenable number.

6403231305 is a deficient number, since it is larger than the sum of its proper divisors (6093111735).

6403231305 is a wasteful number, since it uses less digits than its factorization.

6403231305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 6403231305 is about 80020.1931077400. The cubic root of 6403231305 is about 1856.9479473144.

The spelling of 6403231305 in words is "six billion, four hundred three million, two hundred thirty-one thousand, three hundred five".