220198912931 has 2 divisors, whose sum is σ = 220198912932. Its totient is φ = 220198912930.

The previous prime is 220198912907. The next prime is 220198912939. The reversal of 220198912931 is 139219891022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220198912931 is a prime.

It is a super-2 number, since 2×220198912931² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (220198912939) 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, 110099456465 + 110099456466.

It is an arithmetic number, because the mean of its divisors is an integer number (110099456466).

Almost surely, 2^220198912931 is an apocalyptic number.

220198912931 is a deficient number, since it is larger than the sum of its proper divisors (1).

220198912931 is an equidigital number, since it uses as much as digits as its factorization.

220198912931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 220198912931 in words is "two hundred twenty billion, one hundred ninety-eight million, nine hundred twelve thousand, nine hundred thirty-one".