225994989931 has 2 divisors, whose sum is σ = 225994989932. Its totient is φ = 225994989930.

The previous prime is 225994989901. The next prime is 225994989947. The reversal of 225994989931 is 139989499522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225994989931 is a prime.

It is a super-2 number, since 2×225994989931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225994989901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112997494965 + 112997494966.

It is an arithmetic number, because the mean of its divisors is an integer number (112997494966).

Almost surely, 2^225994989931 is an apocalyptic number.

225994989931 is a deficient number, since it is larger than the sum of its proper divisors (1).

225994989931 is an equidigital number, since it uses as much as digits as its factorization.

225994989931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113374080, while the sum is 70.

The spelling of 225994989931 in words is "two hundred twenty-five billion, nine hundred ninety-four million, nine hundred eighty-nine thousand, nine hundred thirty-one".