21251482 has 16 divisors (see below), whose sum is σ = 36493632. Its totient is φ = 9092160.

The previous prime is 21251467. The next prime is 21251491. The reversal of 21251482 is 28415212.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11473 + ... + 13195.

It is an arithmetic number, because the mean of its divisors is an integer number (2280852).

Almost surely, 2^21251482 is an apocalyptic number.

21251482 is a deficient number, since it is larger than the sum of its proper divisors (15242150).

21251482 is a wasteful number, since it uses less digits than its factorization.

21251482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613.

The product of its digits is 1280, while the sum is 25.

The square root of 21251482 is about 4609.9329713131. The cubic root of 21251482 is about 276.9893517261.

Adding to 21251482 its reverse (28415212), we get a palindrome (49666694).

The spelling of 21251482 in words is "twenty-one million, two hundred fifty-one thousand, four hundred eighty-two".