22525451 has 4 divisors (see below), whose sum is σ = 24258192. Its totient is φ = 20792712.

The previous prime is 22525439. The next prime is 22525457. The reversal of 22525451 is 15452522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15452522 = 2 ⋅7726261.

It is a cyclic number.

It is not a de Polignac number, because 22525451 - 2⁶ = 22525387 is a prime.

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 22525451.

It is not an unprimeable number, because it can be changed into a prime (22525457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866351 + ... + 866376.

It is an arithmetic number, because the mean of its divisors is an integer number (6064548).

Almost surely, 2^22525451 is an apocalyptic number.

22525451 is a deficient number, since it is larger than the sum of its proper divisors (1732741).

22525451 is a wasteful number, since it uses less digits than its factorization.

22525451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732740.

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

The square root of 22525451 is about 4746.0985029812. The cubic root of 22525451 is about 282.4172143671.

Adding to 22525451 its reverse (15452522), we get a palindrome (37977973).

The spelling of 22525451 in words is "twenty-two million, five hundred twenty-five thousand, four hundred fifty-one".