31553321552 has 10 divisors (see below), whose sum is σ = 61134560538. Its totient is φ = 15776660768.

The previous prime is 31553321537. The next prime is 31553321593. The reversal of 31553321552 is 25512335513.

It can be written as a sum of positive squares in only one way, i.e., 26593781776 + 4959539776 = 163076^2 + 70424^2 .

It is a super-2 number, since 2×31553321552² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986041283 + ... + 986041314.

Almost surely, 2^31553321552 is an apocalyptic number.

It is an amenable number.

31553321552 is a deficient number, since it is larger than the sum of its proper divisors (29581238986).

31553321552 is a wasteful number, since it uses less digits than its factorization.

31553321552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972082605 (or 1972082599 counting only the distinct ones).

The product of its digits is 67500, while the sum is 35.

The spelling of 31553321552 in words is "thirty-one billion, five hundred fifty-three million, three hundred twenty-one thousand, five hundred fifty-two".