205224931 has 2 divisors, whose sum is σ = 205224932. Its totient is φ = 205224930.

The previous prime is 205224917. The next prime is 205224989. The reversal of 205224931 is 139422502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205224931 is a prime.

It is a super-2 number, since 2×205224931² = 84234544607909522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205224931.

It is not a weakly prime, because it can be changed into another prime (205224911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102612465 + 102612466.

It is an arithmetic number, because the mean of its divisors is an integer number (102612466).

Almost surely, 2^205224931 is an apocalyptic number.

205224931 is a deficient number, since it is larger than the sum of its proper divisors (1).

205224931 is an equidigital number, since it uses as much as digits as its factorization.

205224931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 205224931 is about 14325.6738410450. The cubic root of 205224931 is about 589.8524298171.

The spelling of 205224931 in words is "two hundred five million, two hundred twenty-four thousand, nine hundred thirty-one".