21880241 has 8 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 20542528.

The previous prime is 21880231. The next prime is 21880247. The reversal of 21880241 is 14208812.

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

It is not a de Polignac number, because 21880241 - 2²² = 17685937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21880241.

It is not an unprimeable number, because it can be changed into a prime (21880247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6800 + ... + 9486.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^21880241 is an apocalyptic number.

It is an amenable number.

21880241 is a deficient number, since it is larger than the sum of its proper divisors (1344079).

21880241 is a wasteful number, since it uses less digits than its factorization.

21880241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 21880241 is about 4677.6319863794. The cubic root of 21880241 is about 279.6945691606.

The spelling of 21880241 in words is "twenty-one million, eight hundred eighty thousand, two hundred forty-one".