400204240331 has 16 divisors (see below), whose sum is σ = 463414119168. Its totient is φ = 338532760800.

The previous prime is 400204240313. The next prime is 400204240333. The reversal of 400204240331 is 133042402004.

It is a cyclic number.

It is not a de Polignac number, because 400204240331 - 2²² = 400200046027 is a prime.

It is a super-2 number, since 2×400204240331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400204240297 and 400204240306.

It is not an unprimeable number, because it can be changed into a prime (400204240333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1039625 + ... + 1371578.

It is an arithmetic number, because the mean of its divisors is an integer number (28963382448).

Almost surely, 2^400204240331 is an apocalyptic number.

400204240331 is a deficient number, since it is larger than the sum of its proper divisors (63209878837).

400204240331 is a wasteful number, since it uses less digits than its factorization.

400204240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411522.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 400204240331 its reverse (133042402004), we get a palindrome (533246642335).

The spelling of 400204240331 in words is "four hundred billion, two hundred four million, two hundred forty thousand, three hundred thirty-one".