31313513043 has 12 divisors (see below), whose sum is σ = 45433460800. Its totient is φ = 20782061136.

The previous prime is 31313513029. The next prime is 31313513059. The reversal of 31313513043 is 34031531313.

31313513043 is a `hidden beast` number, since 3 + 1 + 3 + 1 + 351 + 304 + 3 = 666.

It is not a de Polignac number, because 31313513043 - 2¹⁰ = 31313512019 is a prime.

It is a super-2 number, since 2×31313513043² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313512998 and 31313513016.

It is not an unprimeable number, because it can be changed into a prime (31313511043) 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, 7799068 + ... + 7803081.

Almost surely, 2^31313513043 is an apocalyptic number.

31313513043 is a deficient number, since it is larger than the sum of its proper divisors (14119947757).

31313513043 is a wasteful number, since it uses less digits than its factorization.

31313513043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15602378 (or 15602375 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The spelling of 31313513043 in words is "thirty-one billion, three hundred thirteen million, five hundred thirteen thousand, forty-three".