31431012147 has 28 divisors (see below), whose sum is σ = 47286117984. Its totient is φ = 20882350800.

The previous prime is 31431012131. The next prime is 31431012149. The reversal of 31431012147 is 74121013413.

It is not a de Polignac number, because 31431012147 - 2⁴ = 31431012131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 31431012147.

It is not an unprimeable number, because it can be changed into a prime (31431012149) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 140022 + ... + 287172.

It is an arithmetic number, because the mean of its divisors is an integer number (1688789928).

Almost surely, 2^31431012147 is an apocalyptic number.

31431012147 is a deficient number, since it is larger than the sum of its proper divisors (15855105837).

31431012147 is an equidigital number, since it uses as much as digits as its factorization.

31431012147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147462 (or 147447 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The spelling of 31431012147 in words is "thirty-one billion, four hundred thirty-one million, twelve thousand, one hundred forty-seven".