225733231 has 2 divisors, whose sum is σ = 225733232. Its totient is φ = 225733230.

The previous prime is 225733219. The next prime is 225733237. The reversal of 225733231 is 132337522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225733231 - 2⁹ = 225732719 is a prime.

It is a super-2 number, since 2×225733231² = 101910983155398722, 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 225733231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225733237) 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, 112866615 + 112866616.

It is an arithmetic number, because the mean of its divisors is an integer number (112866616).

Almost surely, 2^225733231 is an apocalyptic number.

225733231 is a deficient number, since it is larger than the sum of its proper divisors (1).

225733231 is an equidigital number, since it uses as much as digits as its factorization.

225733231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 28.

The square root of 225733231 is about 15024.4211535753. The cubic root of 225733231 is about 608.8801733969.

The spelling of 225733231 in words is "two hundred twenty-five million, seven hundred thirty-three thousand, two hundred thirty-one".