225390657 has 4 divisors (see below), whose sum is σ = 300520880. Its totient is φ = 150260436.

The previous prime is 225390637. The next prime is 225390667. The reversal of 225390657 is 756093522.

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 not a de Polignac number, because 225390657 - 2¹⁴ = 225374273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225390617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37565107 + ... + 37565112.

It is an arithmetic number, because the mean of its divisors is an integer number (75130220).

Almost surely, 2^225390657 is an apocalyptic number.

It is an amenable number.

225390657 is a deficient number, since it is larger than the sum of its proper divisors (75130223).

225390657 is an equidigital number, since it uses as much as digits as its factorization.

225390657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75130222.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 225390657 is about 15013.0162525723. The cubic root of 225390657 is about 608.5720041448.

The spelling of 225390657 in words is "two hundred twenty-five million, three hundred ninety thousand, six hundred fifty-seven".