22155091 has 16 divisors (see below), whose sum is σ = 26016256. Its totient is φ = 18475776.

The previous prime is 22155059. The next prime is 22155103. The reversal of 22155091 is 19055122.

It is a cyclic number.

It is not a de Polignac number, because 22155091 - 2⁵ = 22155059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22155011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45250 + ... + 45736.

It is an arithmetic number, because the mean of its divisors is an integer number (1626016).

Almost surely, 2^22155091 is an apocalyptic number.

22155091 is a deficient number, since it is larger than the sum of its proper divisors (3861165).

22155091 is an equidigital number, since it uses as much as digits as its factorization.

22155091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 22155091 is about 4706.9194809344. The cubic root of 22155091 is about 280.8608328833.

The spelling of 22155091 in words is "twenty-two million, one hundred fifty-five thousand, ninety-one".