31401234432220 has 48 divisors (see below), whose sum is σ = 66285874051488. Its totient is φ = 12495109939200.

The previous prime is 31401234432203. The next prime is 31401234432223. The reversal of 31401234432220 is 2223443210413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401234432223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225551272 + ... + 225690448.

It is an arithmetic number, because the mean of its divisors is an integer number (1380955709406).

Almost surely, 2^{31401234432220} is an apocalyptic number.

It is an amenable number.

31401234432220 is an abundant number, since it is smaller than the sum of its proper divisors (34884639619268).

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

31401234432220 is a wasteful number, since it uses less digits than its factorization.

31401234432220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197830 (or 197828 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 31401234432220 its reverse (2223443210413), we get a palindrome (33624677642633).

The spelling of 31401234432220 in words is "thirty-one trillion, four hundred one billion, two hundred thirty-four million, four hundred thirty-two thousand, two hundred twenty".