225515137 has 2 divisors, whose sum is σ = 225515138. Its totient is φ = 225515136.

The previous prime is 225515113. The next prime is 225515167. The reversal of 225515137 is 731515522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153536881 + 71978256 = 12391^2 + 8484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225515137 is a prime.

It is a super-2 number, since 2×225515137² = 101714154032257538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225515099 and 225515108.

It is not a weakly prime, because it can be changed into another prime (225515167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112757568 + 112757569.

It is an arithmetic number, because the mean of its divisors is an integer number (112757569).

Almost surely, 2^225515137 is an apocalyptic number.

It is an amenable number.

225515137 is a deficient number, since it is larger than the sum of its proper divisors (1).

225515137 is an equidigital number, since it uses as much as digits as its factorization.

225515137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 31.

The square root of 225515137 is about 15017.1614161931. The cubic root of 225515137 is about 608.6840186980.

The spelling of 225515137 in words is "two hundred twenty-five million, five hundred fifteen thousand, one hundred thirty-seven".