22415425 has 6 divisors (see below), whose sum is σ = 27795158. Its totient is φ = 17932320.

The previous prime is 22415423. The next prime is 22415447. The reversal of 22415425 is 52451422.

It can be written as a sum of positive squares in 3 ways, for example, as 51984 + 22363441 = 228^2 + 4729^2 .

It is not a de Polignac number, because 22415425 - 2¹ = 22415423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 896617 = 22415425 / (2 + 2 + 4 + 1 + 5 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22415425.

It is not an unprimeable number, because it can be changed into a prime (22415423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448284 + ... + 448333.

Almost surely, 2^22415425 is an apocalyptic number.

22415425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22415425 is a deficient number, since it is larger than the sum of its proper divisors (5379733).

22415425 is an equidigital number, since it uses as much as digits as its factorization.

22415425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896627 (or 896622 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 22415425 is about 4734.4931090878. The cubic root of 22415425 is about 281.9566395448.

Adding to 22415425 its reverse (52451422), we get a palindrome (74866847).

The spelling of 22415425 in words is "twenty-two million, four hundred fifteen thousand, four hundred twenty-five".