21751482 has 16 divisors (see below), whose sum is σ = 43692480. Its totient is φ = 7218912.

The previous prime is 21751481. The next prime is 21751519. The reversal of 21751482 is 28415712.

It is not an unprimeable number, because it can be changed into a prime (21751481) 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, 6382 + ... + 9177.

It is an arithmetic number, because the mean of its divisors is an integer number (2730780).

Almost surely, 2^21751482 is an apocalyptic number.

21751482 is an abundant number, since it is smaller than the sum of its proper divisors (21940998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21751482 is a wasteful number, since it uses less digits than its factorization.

21751482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15797.

The product of its digits is 4480, while the sum is 30.

The square root of 21751482 is about 4663.8484109156. The cubic root of 21751482 is about 279.1448484124.

The spelling of 21751482 in words is "twenty-one million, seven hundred fifty-one thousand, four hundred eighty-two".