31194854081 has 2 divisors, whose sum is σ = 31194854082. Its totient is φ = 31194854080.

The previous prime is 31194854071. The next prime is 31194854087. The reversal of 31194854081 is 18045849113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27840591025 + 3354263056 = 166855^2 + 57916^2 .

It is a cyclic number.

It is not a de Polignac number, because 31194854081 - 2⁶ = 31194854017 is a prime.

It is a super-2 number, since 2×31194854081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31194854087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15597427040 + 15597427041.

It is an arithmetic number, because the mean of its divisors is an integer number (15597427041).

Almost surely, 2^31194854081 is an apocalyptic number.

It is an amenable number.

31194854081 is a deficient number, since it is larger than the sum of its proper divisors (1).

31194854081 is an equidigital number, since it uses as much as digits as its factorization.

31194854081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 31194854081 in words is "thirty-one billion, one hundred ninety-four million, eight hundred fifty-four thousand, eighty-one".