400575631 has 2 divisors, whose sum is σ = 400575632. Its totient is φ = 400575630.

The previous prime is 400575611. The next prime is 400575677. The reversal of 400575631 is 136575004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400575631 - 2⁷ = 400575503 is a prime.

It is a super-2 number, since 2×400575631² = 320921672302096322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 400575593 and 400575602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400575611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200287815 + 200287816.

It is an arithmetic number, because the mean of its divisors is an integer number (200287816).

Almost surely, 2^400575631 is an apocalyptic number.

400575631 is a deficient number, since it is larger than the sum of its proper divisors (1).

400575631 is an equidigital number, since it uses as much as digits as its factorization.

400575631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 400575631 is about 20014.3856013618. The cubic root of 400575631 is about 737.1595707767.

The spelling of 400575631 in words is "four hundred million, five hundred seventy-five thousand, six hundred thirty-one".