31511921148304 has 45 divisors (see below), whose sum is σ = 62230401480513. Its totient is φ = 15458094490176.

The previous prime is 31511921148293. The next prime is 31511921148307. The reversal of 31511921148304 is 40384112911513.

The square root of 31511921148304 is 5613548.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 22716853088400 + 8795068059904 = 4766220^2 + 2965648^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31511921148307) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1190058937 + ... + 1190085415.

Almost surely, 2^{31511921148304} is an apocalyptic number.

31511921148304 is the 5613548-th square number.

It is an amenable number.

31511921148304 is a deficient number, since it is larger than the sum of its proper divisors (30718480332209).

31511921148304 is an frugal number, since it uses more digits than its factorization.

31511921148304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53072 (or 26534 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 31511921148304 in words is "thirty-one trillion, five hundred eleven billion, nine hundred twenty-one million, one hundred forty-eight thousand, three hundred four".