31973244471811 has 2 divisors, whose sum is σ = 31973244471812. Its totient is φ = 31973244471810.

The previous prime is 31973244471659. The next prime is 31973244471821. The reversal of 31973244471811 is 11817444237913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31973244471811 - 2³¹ = 31971096988163 is a prime.

It is not a weakly prime, because it can be changed into another prime (31973244471821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15986622235905 + 15986622235906.

It is an arithmetic number, because the mean of its divisors is an integer number (15986622235906).

Almost surely, 2^{31973244471811} is an apocalyptic number.

31973244471811 is a deficient number, since it is larger than the sum of its proper divisors (1).

31973244471811 is an equidigital number, since it uses as much as digits as its factorization.

31973244471811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The spelling of 31973244471811 in words is "thirty-one trillion, nine hundred seventy-three billion, two hundred forty-four million, four hundred seventy-one thousand, eight hundred eleven".