22500551 has 4 divisors (see below), whose sum is σ = 23108712. Its totient is φ = 21892392.

The previous prime is 22500547. The next prime is 22500557. The reversal of 22500551 is 15500522.

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 22500551 - 2² = 22500547 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 (22500557) 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, 304025 + ... + 304098.

It is an arithmetic number, because the mean of its divisors is an integer number (5777178).

Almost surely, 2^22500551 is an apocalyptic number.

22500551 is a deficient number, since it is larger than the sum of its proper divisors (608161).

22500551 is an equidigital number, since it uses as much as digits as its factorization.

22500551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608160.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 22500551 is about 4743.4745703967. The cubic root of 22500551 is about 282.3131131382.

The spelling of 22500551 in words is "twenty-two million, five hundred thousand, five hundred fifty-one".