31415451161 has 2 divisors, whose sum is σ = 31415451162. Its totient is φ = 31415451160.

The previous prime is 31415451131. The next prime is 31415451167. The reversal of 31415451161 is 16115451413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31415435536 + 15625 = 177244^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 31415451161 - 2¹⁰ = 31415450137 is a prime.

It is not a weakly prime, because it can be changed into another prime (31415451167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15707725580 + 15707725581.

It is an arithmetic number, because the mean of its divisors is an integer number (15707725581).

Almost surely, 2^31415451161 is an apocalyptic number.

It is an amenable number.

31415451161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31415451161 is an equidigital number, since it uses as much as digits as its factorization.

31415451161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The spelling of 31415451161 in words is "thirty-one billion, four hundred fifteen million, four hundred fifty-one thousand, one hundred sixty-one".