225489157 has 4 divisors (see below), whose sum is σ = 225536940. Its totient is φ = 225441376.

The previous prime is 225489149. The next prime is 225489161. The reversal of 225489157 is 751984522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12737761 + 212751396 = 3569^2 + 14586^2 .

It is not a de Polignac number, because 225489157 - 2³ = 225489149 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 (225489107) 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, 15928 + ... + 26545.

It is an arithmetic number, because the mean of its divisors is an integer number (56384235).

Almost surely, 2^225489157 is an apocalyptic number.

It is an amenable number.

225489157 is a deficient number, since it is larger than the sum of its proper divisors (47783).

225489157 is an equidigital number, since it uses as much as digits as its factorization.

225489157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47782.

The product of its digits is 201600, while the sum is 43.

The square root of 225489157 is about 15016.2963809323. The cubic root of 225489157 is about 608.6606437437.

The spelling of 225489157 in words is "two hundred twenty-five million, four hundred eighty-nine thousand, one hundred fifty-seven".