225356731 has 2 divisors, whose sum is σ = 225356732. Its totient is φ = 225356730.

The previous prime is 225356723. The next prime is 225356773. The reversal of 225356731 is 137653522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225356731 - 2³ = 225356723 is a prime.

It is a super-2 number, since 2×225356731² = 101571312414012722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225356431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112678365 + 112678366.

It is an arithmetic number, because the mean of its divisors is an integer number (112678366).

Almost surely, 2^225356731 is an apocalyptic number.

225356731 is a deficient number, since it is larger than the sum of its proper divisors (1).

225356731 is an equidigital number, since it uses as much as digits as its factorization.

225356731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

The square root of 225356731 is about 15011.8863238435. The cubic root of 225356731 is about 608.5414683482.

The spelling of 225356731 in words is "two hundred twenty-five million, three hundred fifty-six thousand, seven hundred thirty-one".