225665364157 has 2 divisors, whose sum is σ = 225665364158. Its totient is φ = 225665364156.

The previous prime is 225665364131. The next prime is 225665364167. The reversal of 225665364157 is 751463566522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172645236036 + 53020128121 = 415506^2 + 230261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225665364157 is a prime.

It is a super-2 number, since 2×225665364157² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225665364167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112832682078 + 112832682079.

It is an arithmetic number, because the mean of its divisors is an integer number (112832682079).

Almost surely, 2^225665364157 is an apocalyptic number.

It is an amenable number.

225665364157 is a deficient number, since it is larger than the sum of its proper divisors (1).

225665364157 is an equidigital number, since it uses as much as digits as its factorization.

225665364157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 52.

The spelling of 225665364157 in words is "two hundred twenty-five billion, six hundred sixty-five million, three hundred sixty-four thousand, one hundred fifty-seven".