31400013231 has 8 divisors (see below), whose sum is σ = 46518538160. Its totient is φ = 20933342136.

The previous prime is 31400013223. The next prime is 31400013277. The reversal of 31400013231 is 13231000413.

31400013231 is a `hidden beast` number, since 31 + 400 + 0 + 1 + 3 + 231 = 666.

It is not a de Polignac number, because 31400013231 - 2³ = 31400013223 is a prime.

It is a super-2 number, since 2×31400013231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400013431) 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, 581481700 + ... + 581481753.

It is an arithmetic number, because the mean of its divisors is an integer number (5814817270).

Almost surely, 2^31400013231 is an apocalyptic number.

31400013231 is a deficient number, since it is larger than the sum of its proper divisors (15118524929).

31400013231 is a wasteful number, since it uses less digits than its factorization.

31400013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162963462 (or 1162963456 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31400013231 its reverse (13231000413), we get a palindrome (44631013644).

The spelling of 31400013231 in words is "thirty-one billion, four hundred million, thirteen thousand, two hundred thirty-one".