22491059 has 4 divisors (see below), whose sum is σ = 22625904. Its totient is φ = 22356216.

The previous prime is 22491047. The next prime is 22491061. The reversal of 22491059 is 95019422.

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

It is a cyclic number.

It is not a de Polignac number, because 22491059 - 2¹² = 22486963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22491019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67172 + ... + 67505.

It is an arithmetic number, because the mean of its divisors is an integer number (5656476).

Almost surely, 2^22491059 is an apocalyptic number.

22491059 is a deficient number, since it is larger than the sum of its proper divisors (134845).

22491059 is a wasteful number, since it uses less digits than its factorization.

22491059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134844.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 22491059 is about 4742.4739324534. The cubic root of 22491059 is about 282.2734090293.

The spelling of 22491059 in words is "twenty-two million, four hundred ninety-one thousand, fifty-nine".