401575531 has 12 divisors (see below), whose sum is σ = 467650800. Its totient is φ = 343830480.

The previous prime is 401575523. The next prime is 401575543. The reversal of 401575531 is 135575104.

It is not a de Polignac number, because 401575531 - 2³ = 401575523 is a prime.

It is a super-2 number, since 2×401575531² = 322525814195863922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401575493 and 401575502.

It is not an unprimeable number, because it can be changed into a prime (401575231) 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, 46545 + ... + 54493.

It is an arithmetic number, because the mean of its divisors is an integer number (38970900).

Almost surely, 2^401575531 is an apocalyptic number.

401575531 is a deficient number, since it is larger than the sum of its proper divisors (66075269).

401575531 is a wasteful number, since it uses less digits than its factorization.

401575531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8994 (or 8987 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 401575531 is about 20039.3495652928. The cubic root of 401575531 is about 737.7724166853.

The spelling of 401575531 in words is "four hundred one million, five hundred seventy-five thousand, five hundred thirty-one".