31431401976 has 64 divisors (see below), whose sum is σ = 84681313920. Its totient is φ = 9664536960.

The previous prime is 31431401971. The next prime is 31431401977. The reversal of 31431401976 is 67910413413.

It is a happy number.

It is a super-3 number, since 3×31431401976³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431401971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428731 + ... + 496661.

It is an arithmetic number, because the mean of its divisors is an integer number (1323145530).

Almost surely, 2^31431401976 is an apocalyptic number.

It is an amenable number.

31431401976 is an abundant number, since it is smaller than the sum of its proper divisors (53249911944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31431401976 is a wasteful number, since it uses less digits than its factorization.

31431401976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69436 (or 69432 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 31431401976 in words is "thirty-one billion, four hundred thirty-one million, four hundred one thousand, nine hundred seventy-six".