225715157 has 4 divisors (see below), whose sum is σ = 225990240. Its totient is φ = 225440076.

The previous prime is 225715141. The next prime is 225715159. The reversal of 225715157 is 751517522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225715157 - 2⁴ = 225715141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225715159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136307 + ... + 137952.

It is an arithmetic number, because the mean of its divisors is an integer number (56497560).

Almost surely, 2^225715157 is an apocalyptic number.

It is an amenable number.

225715157 is a deficient number, since it is larger than the sum of its proper divisors (275083).

225715157 is an equidigital number, since it uses as much as digits as its factorization.

225715157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275082.

The product of its digits is 24500, while the sum is 35.

The square root of 225715157 is about 15023.8196541359. The cubic root of 225715157 is about 608.8639223648.

The spelling of 225715157 in words is "two hundred twenty-five million, seven hundred fifteen thousand, one hundred fifty-seven".