31222144492 has 36 divisors (see below), whose sum is σ = 68637118480. Its totient is φ = 12164470560.

The previous prime is 31222144477. The next prime is 31222144493. The reversal of 31222144492 is 29444122213.

It is not an unprimeable number, because it can be changed into a prime (31222144493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4604367 + ... + 4611142.

Almost surely, 2^31222144492 is an apocalyptic number.

It is an amenable number.

31222144492 is an abundant number, since it is smaller than the sum of its proper divisors (37414973988).

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

31222144492 is a wasteful number, since it uses less digits than its factorization.

31222144492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9215542 (or 9215529 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The spelling of 31222144492 in words is "thirty-one billion, two hundred twenty-two million, one hundred forty-four thousand, four hundred ninety-two".