22255501 has 4 divisors (see below), whose sum is σ = 22271004. Its totient is φ = 22240000.

The previous prime is 22255483. The next prime is 22255507. The reversal of 22255501 is 10555222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 1334025 = 4574^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 22255501 - 2⁵ = 22255469 is a prime.

It is a super-2 number, since 2×22255501² = 990614649522002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255507) 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, 5350 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (5567751).

Almost surely, 2^22255501 is an apocalyptic number.

It is an amenable number.

22255501 is a deficient number, since it is larger than the sum of its proper divisors (15503).

22255501 is a wasteful number, since it uses less digits than its factorization.

22255501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15502.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 22255501 is about 4717.5736348254. The cubic root of 22255501 is about 281.2844938105.

The spelling of 22255501 in words is "twenty-two million, two hundred fifty-five thousand, five hundred one".