31431302214420 has 96 divisors (see below), whose sum is σ = 93195830883456. Its totient is φ = 7887686963200.

The previous prime is 31431302214353. The next prime is 31431302214469. The reversal of 31431302214420 is 2441220313413.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6598480 + ... + 10315160.

It is an arithmetic number, because the mean of its divisors is an integer number (970789905036).

Almost surely, 2^{31431302214420} is an apocalyptic number.

31431302214420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31431302214420 is an abundant number, since it is smaller than the sum of its proper divisors (61764528669036).

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

31431302214420 is a wasteful number, since it uses less digits than its factorization.

31431302214420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725001 (or 3724999 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31431302214420 its reverse (2441220313413), we get a palindrome (33872522527833).

The spelling of 31431302214420 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred two million, two hundred fourteen thousand, four hundred twenty".