401579631 has 12 divisors (see below), whose sum is σ = 582811320. Its totient is φ = 266449680.

The previous prime is 401579603. The next prime is 401579641. The reversal of 401579631 is 136975104.

401579631 is a `hidden beast` number, since 4 + 0 + 15 + 7 + 9 + 631 = 666.

It is not a de Polignac number, because 401579631 - 2⁵ = 401579599 is a prime.

It is a super-2 number, since 2×401579631² = 322532400068192322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401579641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103836 + ... + 107633.

It is an arithmetic number, because the mean of its divisors is an integer number (48567610).

Almost surely, 2^401579631 is an apocalyptic number.

401579631 is a deficient number, since it is larger than the sum of its proper divisors (181231689).

401579631 is a wasteful number, since it uses less digits than its factorization.

401579631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211686 (or 211683 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 401579631 is about 20039.4518637611. The cubic root of 401579631 is about 737.7749275095.

The spelling of 401579631 in words is "four hundred one million, five hundred seventy-nine thousand, six hundred thirty-one".