22551425 has 12 divisors (see below), whose sum is σ = 30115260. Its totient is φ = 16653120.

The previous prime is 22551413. The next prime is 22551437. The reversal of 22551425 is 52415522.

It is an interprime number because it is at equal distance from previous prime (22551413) and next prime (22551437).

It can be written as a sum of positive squares in 6 ways, for example, as 1547536 + 21003889 = 1244^2 + 4583^2 .

It is not a de Polignac number, because 22551425 - 2⁴ = 22551409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22551394 and 22551403.

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, 34370 + ... + 35019.

It is an arithmetic number, because the mean of its divisors is an integer number (2509605).

Almost surely, 2^22551425 is an apocalyptic number.

22551425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22551425 is a deficient number, since it is larger than the sum of its proper divisors (7563835).

22551425 is a wasteful number, since it uses less digits than its factorization.

22551425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69412 (or 69407 counting only the distinct ones).

The product of its digits is 4000, while the sum is 26.

The square root of 22551425 is about 4748.8340674317. The cubic root of 22551425 is about 282.5257240261.

Adding to 22551425 its reverse (52415522), we get a palindrome (74966947).

The spelling of 22551425 in words is "twenty-two million, five hundred fifty-one thousand, four hundred twenty-five".