31303431402 has 16 divisors (see below), whose sum is σ = 62844914880. Its totient is φ = 10394801792.

The previous prime is 31303431391. The next prime is 31303431409. The reversal of 31303431402 is 20413430313.

It is not an unprimeable number, because it can be changed into a prime (31303431409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9917127 + ... + 9920282.

It is an arithmetic number, because the mean of its divisors is an integer number (3927807180).

Almost surely, 2^31303431402 is an apocalyptic number.

31303431402 is an abundant number, since it is smaller than the sum of its proper divisors (31541483478).

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

31303431402 is a wasteful number, since it uses less digits than its factorization.

31303431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19837677.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31303431402 its reverse (20413430313), we get a palindrome (51716861715).

The spelling of 31303431402 in words is "thirty-one billion, three hundred three million, four hundred thirty-one thousand, four hundred two".