22252591 has 4 divisors (see below), whose sum is σ = 23423800. Its totient is φ = 21081384.

The previous prime is 22252579. The next prime is 22252621. The reversal of 22252591 is 19525222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19525222 = 2 ⋅9762611.

It is a cyclic number.

It is not a de Polignac number, because 22252591 - 2¹⁵ = 22219823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22252511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585576 + ... + 585613.

It is an arithmetic number, because the mean of its divisors is an integer number (5855950).

Almost surely, 2^22252591 is an apocalyptic number.

22252591 is a deficient number, since it is larger than the sum of its proper divisors (1171209).

22252591 is a wasteful number, since it uses less digits than its factorization.

22252591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171208.

The product of its digits is 3600, while the sum is 28.

The square root of 22252591 is about 4717.2652034839. The cubic root of 22252591 is about 281.2722335674.

The spelling of 22252591 in words is "twenty-two million, two hundred fifty-two thousand, five hundred ninety-one".