225623457 has 12 divisors (see below), whose sum is σ = 329065984. Its totient is φ = 148954680.

The previous prime is 225623441. The next prime is 225623471. The reversal of 225623457 is 754326522.

225623457 is a `hidden beast` number, since 2 + 25 + 623 + 4 + 5 + 7 = 666.

It is not a de Polignac number, because 225623457 - 2⁴ = 225623441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225623357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120769 + ... + 122622.

Almost surely, 2^225623457 is an apocalyptic number.

It is an amenable number.

225623457 is a deficient number, since it is larger than the sum of its proper divisors (103442527).

225623457 is a wasteful number, since it uses less digits than its factorization.

225623457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243500 (or 243497 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 225623457 is about 15020.7675236654. The cubic root of 225623457 is about 608.7814579805.

Adding to 225623457 its reverse (754326522), we get a palindrome (979949979).

The spelling of 225623457 in words is "two hundred twenty-five million, six hundred twenty-three thousand, four hundred fifty-seven".