31742867461 has 2 divisors, whose sum is σ = 31742867462. Its totient is φ = 31742867460.

The previous prime is 31742867413. The next prime is 31742867549. The reversal of 31742867461 is 16476824713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31339620900 + 403246561 = 177030^2 + 20081^2 .

It is an emirp because it is prime and its reverse (16476824713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31742867461 - 2²⁷ = 31608649733 is a prime.

It is a super-2 number, since 2×31742867461² (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 (31742867561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15871433730 + 15871433731.

It is an arithmetic number, because the mean of its divisors is an integer number (15871433731).

Almost surely, 2^31742867461 is an apocalyptic number.

It is an amenable number.

31742867461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31742867461 is an equidigital number, since it uses as much as digits as its factorization.

31742867461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The spelling of 31742867461 in words is "thirty-one billion, seven hundred forty-two million, eight hundred sixty-seven thousand, four hundred sixty-one".