22645091 has 16 divisors (see below), whose sum is σ = 26539968. Its totient is φ = 18921600.

The previous prime is 22645067. The next prime is 22645099. The reversal of 22645091 is 19054622.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22645091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22645099) 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, 77141 + ... + 77433.

It is an arithmetic number, because the mean of its divisors is an integer number (1658748).

Almost surely, 2^22645091 is an apocalyptic number.

22645091 is a deficient number, since it is larger than the sum of its proper divisors (3894877).

22645091 is a wasteful number, since it uses less digits than its factorization.

22645091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 22645091 is about 4758.6858480047. The cubic root of 22645091 is about 282.9163349845.

The spelling of 22645091 in words is "twenty-two million, six hundred forty-five thousand, ninety-one".