225215122 has 24 divisors (see below), whose sum is σ = 374091228. Its totient is φ = 101608320.

The previous prime is 225215119. The next prime is 225215161. The reversal of 225215122 is 221512522.

It can be written as a sum of positive squares in 2 ways, for example, as 217592001 + 7623121 = 14751^2 + 2761^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 225215093 and 225215102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29758 + ... + 36550.

Almost surely, 2^225215122 is an apocalyptic number.

225215122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

225215122 is a deficient number, since it is larger than the sum of its proper divisors (148876106).

225215122 is a wasteful number, since it uses less digits than its factorization.

225215122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954 (or 6943 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 225215122 is about 15007.1690201717. The cubic root of 225215122 is about 608.4139771407.

Adding to 225215122 its reverse (221512522), we get a palindrome (446727644).

The spelling of 225215122 in words is "two hundred twenty-five million, two hundred fifteen thousand, one hundred twenty-two".