225423570 has 32 divisors (see below), whose sum is σ = 572842368. Its totient is φ = 56576768.

The previous prime is 225423563. The next prime is 225423571. The reversal of 225423570 is 75324522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225423571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220494 + ... + 221513.

It is an arithmetic number, because the mean of its divisors is an integer number (17901324).

Almost surely, 2^225423570 is an apocalyptic number.

225423570 is an abundant number, since it is smaller than the sum of its proper divisors (347418798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225423570 is a wasteful number, since it uses less digits than its factorization.

225423570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442034.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 225423570 is about 15014.1123613752. The cubic root of 225423570 is about 608.6016252417.

The spelling of 225423570 in words is "two hundred twenty-five million, four hundred twenty-three thousand, five hundred seventy".