225388831 has 2 divisors, whose sum is σ = 225388832. Its totient is φ = 225388830.

The previous prime is 225388789. The next prime is 225388837. The reversal of 225388831 is 138883522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225388831 is a prime.

It is a super-3 number, since 3×225388831³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225388837) 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, 112694415 + 112694416.

It is an arithmetic number, because the mean of its divisors is an integer number (112694416).

Almost surely, 2^225388831 is an apocalyptic number.

225388831 is a deficient number, since it is larger than the sum of its proper divisors (1).

225388831 is an equidigital number, since it uses as much as digits as its factorization.

225388831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 40.

The square root of 225388831 is about 15012.9554385537. The cubic root of 225388831 is about 608.5703606939.

The spelling of 225388831 in words is "two hundred twenty-five million, three hundred eighty-eight thousand, eight hundred thirty-one".