22913155 has 4 divisors (see below), whose sum is σ = 27495792. Its totient is φ = 18330520.

The previous prime is 22913147. The next prime is 22913171. The reversal of 22913155 is 55131922.

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

It is not a de Polignac number, because 22913155 - 2³ = 22913147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2291311 + ... + 2291320.

It is an arithmetic number, because the mean of its divisors is an integer number (6873948).

Almost surely, 2^22913155 is an apocalyptic number.

22913155 is a deficient number, since it is larger than the sum of its proper divisors (4582637).

22913155 is an equidigital number, since it uses as much as digits as its factorization.

22913155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582636.

The product of its digits is 2700, while the sum is 28.

The square root of 22913155 is about 4786.7687431084. The cubic root of 22913155 is about 284.0283108390.

The spelling of 22913155 in words is "twenty-two million, nine hundred thirteen thousand, one hundred fifty-five".