31224022057 has 2 divisors, whose sum is σ = 31224022058. Its totient is φ = 31224022056.

The previous prime is 31224022031. The next prime is 31224022061. The reversal of 31224022057 is 75022042213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22017811456 + 9206210601 = 148384^2 + 95949^2 .

It is a cyclic number.

It is not a de Polignac number, because 31224022057 - 2¹⁵ = 31223989289 is a prime.

It is a super-2 number, since 2×31224022057² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31224022097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15612011028 + 15612011029.

It is an arithmetic number, because the mean of its divisors is an integer number (15612011029).

Almost surely, 2^31224022057 is an apocalyptic number.

It is an amenable number.

31224022057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31224022057 is an equidigital number, since it uses as much as digits as its factorization.

31224022057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 31224022057 in words is "thirty-one billion, two hundred twenty-four million, twenty-two thousand, fifty-seven".