225992731 has 2 divisors, whose sum is σ = 225992732. Its totient is φ = 225992730.

The previous prime is 225992729. The next prime is 225992749. The reversal of 225992731 is 137299522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225992731 - 2¹ = 225992729 is a prime.

It is a super-2 number, since 2×225992731² = 102145428929676722, which contains 22 as substring.

Together with 225992729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (225992131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112996365 + 112996366.

It is an arithmetic number, because the mean of its divisors is an integer number (112996366).

Almost surely, 2^225992731 is an apocalyptic number.

225992731 is a deficient number, since it is larger than the sum of its proper divisors (1).

225992731 is an equidigital number, since it uses as much as digits as its factorization.

225992731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 225992731 is about 15033.0546130851. The cubic root of 225992731 is about 609.1134043016.

The spelling of 225992731 in words is "two hundred twenty-five million, nine hundred ninety-two thousand, seven hundred thirty-one".