21925055 has 8 divisors (see below), whose sum is σ = 26922192. Its totient is φ = 17131968.

The previous prime is 21925021. The next prime is 21925097. The reversal of 21925055 is 55052912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21925055 - 2¹⁰ = 21924031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50774 + ... + 51203.

It is an arithmetic number, because the mean of its divisors is an integer number (3365274).

Almost surely, 2^21925055 is an apocalyptic number.

21925055 is a deficient number, since it is larger than the sum of its proper divisors (4997137).

21925055 is a wasteful number, since it uses less digits than its factorization.

21925055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102025.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 21925055 is about 4682.4197804127. The cubic root of 21925055 is about 279.8853910201.

Adding to 21925055 its reverse (55052912), we get a palindrome (76977967).

The spelling of 21925055 in words is "twenty-one million, nine hundred twenty-five thousand, fifty-five".