31351553511461 has 2 divisors, whose sum is σ = 31351553511462. Its totient is φ = 31351553511460.

The previous prime is 31351553511449. The next prime is 31351553511569. The reversal of 31351553511461 is 16411535515313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24760267488961 + 6591286022500 = 4975969^2 + 2567350^2 .

It is a cyclic number.

It is not a de Polignac number, because 31351553511461 - 2²² = 31351549317157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31351553511431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15675776755730 + 15675776755731.

It is an arithmetic number, because the mean of its divisors is an integer number (15675776755731).

Almost surely, 2^{31351553511461} is an apocalyptic number.

It is an amenable number.

31351553511461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31351553511461 is an equidigital number, since it uses as much as digits as its factorization.

31351553511461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 44.

The spelling of 31351553511461 in words is "thirty-one trillion, three hundred fifty-one billion, five hundred fifty-three million, five hundred eleven thousand, four hundred sixty-one".