22155513 has 4 divisors (see below), whose sum is σ = 29540688. Its totient is φ = 14770340.

The previous prime is 22155491. The next prime is 22155547. The reversal of 22155513 is 31555122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22155513 - 2⁵ = 22155481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22155583) by changing a digit.

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, 3692583 + ... + 3692588.

It is an arithmetic number, because the mean of its divisors is an integer number (7385172).

Almost surely, 2^22155513 is an apocalyptic number.

It is an amenable number.

22155513 is a deficient number, since it is larger than the sum of its proper divisors (7385175).

22155513 is an equidigital number, since it uses as much as digits as its factorization.

22155513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385174.

The product of its digits is 1500, while the sum is 24.

The square root of 22155513 is about 4706.9643083414. The cubic root of 22155513 is about 280.8626161081.

The spelling of 22155513 in words is "twenty-two million, one hundred fifty-five thousand, five hundred thirteen".