31116011893 has 2 divisors, whose sum is σ = 31116011894. Its totient is φ = 31116011892.

The previous prime is 31116011873. The next prime is 31116011911. The reversal of 31116011893 is 39811061113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16104371409 + 15011640484 = 126903^2 + 122522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31116011893 is a prime.

It is a super-2 number, since 2×31116011893² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31116011873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15558005946 + 15558005947.

It is an arithmetic number, because the mean of its divisors is an integer number (15558005947).

Almost surely, 2^31116011893 is an apocalyptic number.

It is an amenable number.

31116011893 is a deficient number, since it is larger than the sum of its proper divisors (1).

31116011893 is an equidigital number, since it uses as much as digits as its factorization.

31116011893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 31116011893 in words is "thirty-one billion, one hundred sixteen million, eleven thousand, eight hundred ninety-three".