400313031 has 4 divisors (see below), whose sum is σ = 533750712. Its totient is φ = 266875352.

The previous prime is 400313029. The next prime is 400313051. The reversal of 400313031 is 130313004.

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 400313031 - 2¹ = 400313029 is a prime.

It is a super-2 number, since 2×400313031² = 320501045576813922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400313031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400313051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66718836 + ... + 66718841.

It is an arithmetic number, because the mean of its divisors is an integer number (133437678).

Almost surely, 2^400313031 is an apocalyptic number.

400313031 is a deficient number, since it is larger than the sum of its proper divisors (133437681).

400313031 is a wasteful number, since it uses less digits than its factorization.

400313031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133437680.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 400313031 is about 20007.8242445299. The cubic root of 400313031 is about 736.9984522894.

Adding to 400313031 its reverse (130313004), we get a palindrome (530626035).

The spelling of 400313031 in words is "four hundred million, three hundred thirteen thousand, thirty-one".