22451155 has 4 divisors (see below), whose sum is σ = 26941392. Its totient is φ = 17960920.

The previous prime is 22451147. The next prime is 22451167. The reversal of 22451155 is 55115422.

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

It is not a de Polignac number, because 22451155 - 2³ = 22451147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2245111 + ... + 2245120.

It is an arithmetic number, because the mean of its divisors is an integer number (6735348).

Almost surely, 2^22451155 is an apocalyptic number.

22451155 is a deficient number, since it is larger than the sum of its proper divisors (4490237).

22451155 is an equidigital number, since it uses as much as digits as its factorization.

22451155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490236.

The product of its digits is 2000, while the sum is 25.

The square root of 22451155 is about 4738.2649778162. The cubic root of 22451155 is about 282.1063721907.

Adding to 22451155 its reverse (55115422), we get a palindrome (77566577).

The spelling of 22451155 in words is "twenty-two million, four hundred fifty-one thousand, one hundred fifty-five".