31220100193 has 2 divisors, whose sum is σ = 31220100194. Its totient is φ = 31220100192.

The previous prime is 31220100179. The next prime is 31220100253. The reversal of 31220100193 is 39100102213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22375073889 + 8845026304 = 149583^2 + 94048^2 .

It is a cyclic number.

It is not a de Polignac number, because 31220100193 - 2³³ = 22630165601 is a prime.

It is not a weakly prime, because it can be changed into another prime (31220100293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610050096 + 15610050097.

It is an arithmetic number, because the mean of its divisors is an integer number (15610050097).

Almost surely, 2^31220100193 is an apocalyptic number.

It is an amenable number.

31220100193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220100193 is an equidigital number, since it uses as much as digits as its factorization.

31220100193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 31220100193 in words is "thirty-one billion, two hundred twenty million, one hundred thousand, one hundred ninety-three".