21575483 has 4 divisors (see below), whose sum is σ = 21593880. Its totient is φ = 21557088.

The previous prime is 21575467. The next prime is 21575497. The reversal of 21575483 is 38457512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21575483 - 2⁴ = 21575467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21575413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7310 + ... + 9827.

It is an arithmetic number, because the mean of its divisors is an integer number (5398470).

Almost surely, 2^21575483 is an apocalyptic number.

21575483 is a deficient number, since it is larger than the sum of its proper divisors (18397).

21575483 is a wasteful number, since it uses less digits than its factorization.

21575483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18396.

The product of its digits is 33600, while the sum is 35.

The square root of 21575483 is about 4644.9416573300. The cubic root of 21575483 is about 278.3899217613.

The spelling of 21575483 in words is "twenty-one million, five hundred seventy-five thousand, four hundred eighty-three".