401315657 has 12 divisors (see below), whose sum is σ = 413301840. Its totient is φ = 389652936.

The previous prime is 401315641. The next prime is 401315671. The reversal of 401315657 is 756513104.

It is not a de Polignac number, because 401315657 - 2⁴ = 401315641 is a prime.

It is a super-2 number, since 2×401315657² = 322108513106683298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401315687) 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, 306398 + ... + 307704.

It is an arithmetic number, because the mean of its divisors is an integer number (34441820).

Almost surely, 2^401315657 is an apocalyptic number.

401315657 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

401315657 is a deficient number, since it is larger than the sum of its proper divisors (11986183).

401315657 is a wasteful number, since it uses less digits than its factorization.

401315657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 401315657 is about 20032.8644232421. The cubic root of 401315657 is about 737.6132359691.

The spelling of 401315657 in words is "four hundred one million, three hundred fifteen thousand, six hundred fifty-seven".