401312131 has 8 divisors (see below), whose sum is σ = 446055984. Its totient is φ = 357945120.

The previous prime is 401312113. The next prime is 401312203. The reversal of 401312131 is 131213104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401312131 is a prime.

It is a super-2 number, since 2×401312131² = 322102852975522322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401312231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343596 + ... + 344761.

It is an arithmetic number, because the mean of its divisors is an integer number (55756998).

Almost surely, 2^401312131 is an apocalyptic number.

401312131 is a deficient number, since it is larger than the sum of its proper divisors (44743853).

401312131 is a wasteful number, since it uses less digits than its factorization.

401312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688421.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 401312131 is about 20032.7764176611. The cubic root of 401312131 is about 737.6110757146.

Adding to 401312131 its reverse (131213104), we get a palindrome (532525235).

The spelling of 401312131 in words is "four hundred one million, three hundred twelve thousand, one hundred thirty-one".