401400312931 has 4 divisors (see below), whose sum is σ = 401416134664. Its totient is φ = 401384491200.

The previous prime is 401400312923. The next prime is 401400312991. The reversal of 401400312931 is 139213004104.

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 401400312931 - 2³ = 401400312923 is a prime.

It is a super-2 number, since 2×401400312931² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401400312931.

It is not an unprimeable number, because it can be changed into a prime (401400312991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7872750 + ... + 7923571.

It is an arithmetic number, because the mean of its divisors is an integer number (100354033666).

Almost surely, 2^401400312931 is an apocalyptic number.

401400312931 is a deficient number, since it is larger than the sum of its proper divisors (15821733).

401400312931 is a wasteful number, since it uses less digits than its factorization.

401400312931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15821732.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 401400312931 in words is "four hundred one billion, four hundred million, three hundred twelve thousand, nine hundred thirty-one".