21482525 has 18 divisors (see below), whose sum is σ = 27287130. Its totient is φ = 16777120.

The previous prime is 21482519. The next prime is 21482557. The reversal of 21482525 is 52528412.

It can be written as a sum of positive squares in 3 ways, for example, as 267289 + 21215236 = 517^2 + 4606^2 .

It is not a de Polignac number, because 21482525 - 2¹⁰ = 21481501 is a prime.

It is a super-2 number, since 2×21482525² = 922997760751250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 55031 + ... + 55419.

Almost surely, 2^21482525 is an apocalyptic number.

21482525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21482525 is a deficient number, since it is larger than the sum of its proper divisors (5804605).

21482525 is an equidigital number, since it uses as much as digits as its factorization.

21482525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 441 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 21482525 is about 4634.9244869793. The cubic root of 21482525 is about 277.9895317211.

The spelling of 21482525 in words is "twenty-one million, four hundred eighty-two thousand, five hundred twenty-five".