225997237 has 2 divisors, whose sum is σ = 225997238. Its totient is φ = 225997236.

The previous prime is 225997217. The next prime is 225997249. The reversal of 225997237 is 732799522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160807761 + 65189476 = 12681^2 + 8074^2 .

It is a cyclic number.

It is not a de Polignac number, because 225997237 - 2²⁷ = 91779509 is a prime.

It is a super-2 number, since 2×225997237² = 102149502263268338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225997217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112998618 + 112998619.

It is an arithmetic number, because the mean of its divisors is an integer number (112998619).

Almost surely, 2^225997237 is an apocalyptic number.

It is an amenable number.

225997237 is a deficient number, since it is larger than the sum of its proper divisors (1).

225997237 is an equidigital number, since it uses as much as digits as its factorization.

225997237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The square root of 225997237 is about 15033.2044820790. The cubic root of 225997237 is about 609.1174525834.

The spelling of 225997237 in words is "two hundred twenty-five million, nine hundred ninety-seven thousand, two hundred thirty-seven".