22611225 has 48 divisors (see below), whose sum is σ = 46024832. Its totient is φ = 9538560.

The previous prime is 22611223. The next prime is 22611247. The reversal of 22611225 is 52211622.

It is a happy number.

It is not a de Polignac number, because 22611225 - 2¹ = 22611223 is a prime.

It is a super-2 number, since 2×22611225² = 1022534992001250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22611221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5169 + ... + 8481.

Almost surely, 2^22611225 is an apocalyptic number.

22611225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22611225 is an abundant number, since it is smaller than the sum of its proper divisors (23413607).

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

22611225 is a wasteful number, since it uses less digits than its factorization.

22611225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346 (or 3341 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 22611225 is about 4755.1261812911. The cubic root of 22611225 is about 282.7752297171.

Adding to 22611225 its reverse (52211622), we get a palindrome (74822847).

It can be divided in two parts, 2261 and 1225, that added together give a triangular number (3486 = T₈₃).

The spelling of 22611225 in words is "twenty-two million, six hundred eleven thousand, two hundred twenty-five".