22152451 has 4 divisors (see below), whose sum is σ = 22419432. Its totient is φ = 21885472.

The previous prime is 22152437. The next prime is 22152467. The reversal of 22152451 is 15425122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22152451 - 2⁷ = 22152323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22152401) 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, 133366 + ... + 133531.

It is an arithmetic number, because the mean of its divisors is an integer number (5604858).

Almost surely, 2^22152451 is an apocalyptic number.

22152451 is a deficient number, since it is larger than the sum of its proper divisors (266981).

22152451 is an equidigital number, since it uses as much as digits as its factorization.

22152451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266980.

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

The square root of 22152451 is about 4706.6390343854. The cubic root of 22152451 is about 280.8496766506.

Adding to 22152451 its reverse (15425122), we get a palindrome (37577573).

The spelling of 22152451 in words is "twenty-two million, one hundred fifty-two thousand, four hundred fifty-one".