31423141961 has 2 divisors, whose sum is σ = 31423141962. Its totient is φ = 31423141960.

The previous prime is 31423141943. The next prime is 31423141969. The reversal of 31423141961 is 16914132413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26333175625 + 5089966336 = 162275^2 + 71344^2 .

It is an emirp because it is prime and its reverse (16914132413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31423141961 - 2²² = 31418947657 is a prime.

It is not a weakly prime, because it can be changed into another prime (31423141969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711570980 + 15711570981.

It is an arithmetic number, because the mean of its divisors is an integer number (15711570981).

Almost surely, 2^31423141961 is an apocalyptic number.

It is an amenable number.

31423141961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423141961 is an equidigital number, since it uses as much as digits as its factorization.

31423141961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The spelling of 31423141961 in words is "thirty-one billion, four hundred twenty-three million, one hundred forty-one thousand, nine hundred sixty-one".