22315555 has 4 divisors (see below), whose sum is σ = 26778672. Its totient is φ = 17852440.

The previous prime is 22315549. The next prime is 22315637. The reversal of 22315555 is 55551322.

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

It is not a de Polignac number, because 22315555 - 2³ = 22315547 is a prime.

It is a super-3 number, since 3×22315555³ (a number of 23 digits) contains 333 as substring.

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, 2231551 + ... + 2231560.

It is an arithmetic number, because the mean of its divisors is an integer number (6694668).

Almost surely, 2^22315555 is an apocalyptic number.

22315555 is a deficient number, since it is larger than the sum of its proper divisors (4463117).

22315555 is an equidigital number, since it uses as much as digits as its factorization.

22315555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463116.

The product of its digits is 7500, while the sum is 28.

The square root of 22315555 is about 4723.9342713463. The cubic root of 22315555 is about 281.5372715809.

Adding to 22315555 its reverse (55551322), we get a palindrome (77866877).

The spelling of 22315555 in words is "twenty-two million, three hundred fifteen thousand, five hundred fifty-five".