21575482 has 8 divisors (see below), whose sum is σ = 34266996. Its totient is φ = 10153152.

The previous prime is 21575467. The next prime is 21575497. The reversal of 21575482 is 28457512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21575467) and next prime (21575497).

It can be written as a sum of positive squares in 2 ways, for example, as 21353641 + 221841 = 4621^2 + 471^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 634573 = 21575482 / (2 + 1 + 5 + 7 + 5 + 4 + 8 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317253 + ... + 317320.

Almost surely, 2^21575482 is an apocalyptic number.

21575482 is a deficient number, since it is larger than the sum of its proper divisors (12691514).

21575482 is a wasteful number, since it uses less digits than its factorization.

21575482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634592.

The product of its digits is 22400, while the sum is 34.

The square root of 21575482 is about 4644.9415496861. The cubic root of 21575482 is about 278.3899174603.

The spelling of 21575482 in words is "twenty-one million, five hundred seventy-five thousand, four hundred eighty-two".