225637831 has 2 divisors, whose sum is σ = 225637832. Its totient is φ = 225637830.

The previous prime is 225637781. The next prime is 225637837. The reversal of 225637831 is 138736522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225637831 - 2¹¹ = 225635783 is a prime.

It is a super-2 number, since 2×225637831² = 101824861556769122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225637837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112818915 + 112818916.

It is an arithmetic number, because the mean of its divisors is an integer number (112818916).

Almost surely, 2^225637831 is an apocalyptic number.

225637831 is a deficient number, since it is larger than the sum of its proper divisors (1).

225637831 is an equidigital number, since it uses as much as digits as its factorization.

225637831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 225637831 is about 15021.2459869346. The cubic root of 225637831 is about 608.7943857717.

The spelling of 225637831 in words is "two hundred twenty-five million, six hundred thirty-seven thousand, eight hundred thirty-one".