31431312429 has 16 divisors (see below), whose sum is σ = 45753802560. Its totient is φ = 19034476160.

The previous prime is 31431312389. The next prime is 31431312433. The reversal of 31431312429 is 92421313413.

It is a cyclic number.

It is not a de Polignac number, because 31431312429 - 2⁷ = 31431312301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31431312429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431312629) 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, 326922 + ... + 411995.

It is an arithmetic number, because the mean of its divisors is an integer number (2859612660).

Almost surely, 2^31431312429 is an apocalyptic number.

It is an amenable number.

31431312429 is a deficient number, since it is larger than the sum of its proper divisors (14322490131).

31431312429 is a wasteful number, since it uses less digits than its factorization.

31431312429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740220.

The product of its digits is 15552, while the sum is 33.

The spelling of 31431312429 in words is "thirty-one billion, four hundred thirty-one million, three hundred twelve thousand, four hundred twenty-nine".