31400431414220 has 48 divisors (see below), whose sum is σ = 71936649717408. Its totient is φ = 11418161564160.

The previous prime is 31400431414207. The next prime is 31400431414243. The reversal of 31400431414220 is 2241413400413.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13546694 + ... + 15694386.

It is an arithmetic number, because the mean of its divisors is an integer number (1498680202446).

Almost surely, 2^{31400431414220} is an apocalyptic number.

It is an amenable number.

31400431414220 is an abundant number, since it is smaller than the sum of its proper divisors (40536218303188).

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

31400431414220 is a wasteful number, since it uses less digits than its factorization.

31400431414220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214170 (or 2214168 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 31400431414220 its reverse (2241413400413), we get a palindrome (33641844814633).

The spelling of 31400431414220 in words is "thirty-one trillion, four hundred billion, four hundred thirty-one million, four hundred fourteen thousand, two hundred twenty".