31144323100220 has 48 divisors (see below), whose sum is σ = 72695016965088. Its totient is φ = 11111525218560.

The previous prime is 31144323100159. The next prime is 31144323100279. The reversal of 31144323100220 is 2200132344113.

It is a super-2 number, since 2×31144323100220² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31144323100220.

It is a congruent number.

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, 1335508199 + ... + 1335531518.

It is an arithmetic number, because the mean of its divisors is an integer number (1514479520106).

Almost surely, 2^{31144323100220} is an apocalyptic number.

It is an amenable number.

31144323100220 is an abundant number, since it is smaller than the sum of its proper divisors (41550693864868).

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

31144323100220 is a wasteful number, since it uses less digits than its factorization.

31144323100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671039790 (or 2671039788 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31144323100220 its reverse (2200132344113), we get a palindrome (33344455444333).

The spelling of 31144323100220 in words is "thirty-one trillion, one hundred forty-four billion, three hundred twenty-three million, one hundred thousand, two hundred twenty".