313511515540 has 12 divisors (see below), whose sum is σ = 658374182676. Its totient is φ = 125404606208.

The previous prime is 313511515529. The next prime is 313511515621. The reversal of 313511515540 is 45515115313.

It can be written as a sum of positive squares in 2 ways, for example, as 155549782404 + 157961733136 = 394398^2 + 397444^2 .

It is a super-2 number, since 2×313511515540² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313511515496 and 313511515505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7837787869 + ... + 7837787908.

It is an arithmetic number, because the mean of its divisors is an integer number (54864515223).

Almost surely, 2^313511515540 is an apocalyptic number.

It is an amenable number.

313511515540 is an abundant number, since it is smaller than the sum of its proper divisors (344862667136).

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

313511515540 is a wasteful number, since it uses less digits than its factorization.

313511515540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15675575786 (or 15675575784 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 313511515540 in words is "three hundred thirteen billion, five hundred eleven million, five hundred fifteen thousand, five hundred forty".