225421245 has 64 divisors (see below), whose sum is σ = 460247040. Its totient is φ = 102544704.

The previous prime is 225421177. The next prime is 225421283. The reversal of 225421245 is 542124522.

It is not a de Polignac number, because 225421245 - 2⁸ = 225420989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 248082 + ... + 248988.

It is an arithmetic number, because the mean of its divisors is an integer number (7191360).

Almost surely, 2^225421245 is an apocalyptic number.

It is an amenable number.

225421245 is an abundant number, since it is smaller than the sum of its proper divisors (234825795).

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

225421245 is a wasteful number, since it uses less digits than its factorization.

225421245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1185 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 225421245 is about 15014.0349340209. The cubic root of 225421245 is about 608.5995328790.

Adding to 225421245 its reverse (542124522), we get a palindrome (767545767).

The spelling of 225421245 in words is "two hundred twenty-five million, four hundred twenty-one thousand, two hundred forty-five".