21544522 has 8 divisors (see below), whose sum is σ = 32563872. Its totient is φ = 10689900.

The previous prime is 21544519. The next prime is 21544531. The reversal of 21544522 is 22544512.

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

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, 40854 + ... + 41377.

It is an arithmetic number, because the mean of its divisors is an integer number (4070484).

Almost surely, 2^21544522 is an apocalyptic number.

21544522 is a deficient number, since it is larger than the sum of its proper divisors (11019350).

21544522 is a wasteful number, since it uses less digits than its factorization.

21544522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82364.

The product of its digits is 3200, while the sum is 25.

The square root of 21544522 is about 4641.6076956158. The cubic root of 21544522 is about 278.2566940518.

The spelling of 21544522 in words is "twenty-one million, five hundred forty-four thousand, five hundred twenty-two".