401320431 has 6 divisors (see below), whose sum is σ = 579685080. Its totient is φ = 267546948.

The previous prime is 401320427. The next prime is 401320433. The reversal of 401320431 is 134023104.

It is not a de Polignac number, because 401320431 - 2² = 401320427 is a prime.

It is a super-2 number, since 2×401320431² = 322116176676051522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401320433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22295571 + ... + 22295588.

It is an arithmetic number, because the mean of its divisors is an integer number (96614180).

Almost surely, 2^401320431 is an apocalyptic number.

401320431 is a deficient number, since it is larger than the sum of its proper divisors (178364649).

401320431 is a wasteful number, since it uses less digits than its factorization.

401320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44591165 (or 44591162 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 401320431 is about 20032.9835770911. The cubic root of 401320431 is about 737.6161608086.

Adding to 401320431 its reverse (134023104), we get a palindrome (535343535).

The spelling of 401320431 in words is "four hundred one million, three hundred twenty thousand, four hundred thirty-one".