31431131215432 has 64 divisors (see below), whose sum is σ = 67202152174080. Its totient is φ = 13652913533952.

The previous prime is 31431131215409. The next prime is 31431131215439. The reversal of 31431131215432 is 23451213113413.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (31431131215439) 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 15 ways as a sum of consecutive naturals, for example, 59713833 + ... + 60237895.

It is an arithmetic number, because the mean of its divisors is an integer number (1050033627720).

Almost surely, 2^{31431131215432} is an apocalyptic number.

It is an amenable number.

31431131215432 is an abundant number, since it is smaller than the sum of its proper divisors (35771020958648).

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

31431131215432 is a wasteful number, since it uses less digits than its factorization.

31431131215432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558022 (or 558018 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

Adding to 31431131215432 its reverse (23451213113413), we get a palindrome (54882344328845).

The spelling of 31431131215432 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred thirty-one million, two hundred fifteen thousand, four hundred thirty-two".