22555597 has 4 divisors (see below), whose sum is σ = 22629376. Its totient is φ = 22481820.

The previous prime is 22555579. The next prime is 22555619. The reversal of 22555597 is 79555522.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79555522 = 2 ⋅39777761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22555597 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 (22550597) 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, 36429 + ... + 37042.

It is an arithmetic number, because the mean of its divisors is an integer number (5657344).

Almost surely, 2^22555597 is an apocalyptic number.

It is an amenable number.

22555597 is a deficient number, since it is larger than the sum of its proper divisors (73779).

22555597 is an equidigital number, since it uses as much as digits as its factorization.

22555597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73778.

The product of its digits is 157500, while the sum is 40.

The square root of 22555597 is about 4749.2733128343. The cubic root of 22555597 is about 282.5431453146.

The spelling of 22555597 in words is "twenty-two million, five hundred fifty-five thousand, five hundred ninety-seven".