21882755 has 4 divisors (see below), whose sum is σ = 26259312. Its totient is φ = 17506200.

The previous prime is 21882739. The next prime is 21882781. The reversal of 21882755 is 55728812.

It is a happy number.

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

It is not a de Polignac number, because 21882755 - 2⁴ = 21882739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2188271 + ... + 2188280.

It is an arithmetic number, because the mean of its divisors is an integer number (6564828).

Almost surely, 2^21882755 is an apocalyptic number.

21882755 is a deficient number, since it is larger than the sum of its proper divisors (4376557).

21882755 is an equidigital number, since it uses as much as digits as its factorization.

21882755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376556.

The product of its digits is 44800, while the sum is 38.

The square root of 21882755 is about 4677.9007043758. The cubic root of 21882755 is about 279.7052808832.

The spelling of 21882755 in words is "twenty-one million, eight hundred eighty-two thousand, seven hundred fifty-five".