225521270 has 32 divisors (see below), whose sum is σ = 444346560. Its totient is φ = 81901440.

The previous prime is 225521267. The next prime is 225521299. The reversal of 225521270 is 72125522.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6290 + ... + 22149.

It is an arithmetic number, because the mean of its divisors is an integer number (13885830).

Almost surely, 2^225521270 is an apocalyptic number.

225521270 is a deficient number, since it is larger than the sum of its proper divisors (218825290).

225521270 is a wasteful number, since it uses less digits than its factorization.

225521270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28520.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 225521270 is about 15017.3656145144. The cubic root of 225521270 is about 608.6895364729.

Adding to 225521270 its reverse (72125522), we get a palindrome (297646792).

The spelling of 225521270 in words is "two hundred twenty-five million, five hundred twenty-one thousand, two hundred seventy".