21514252 has 6 divisors (see below), whose sum is σ = 37649948. Its totient is φ = 10757124.

The previous prime is 21514249. The next prime is 21514301. The reversal of 21514252 is 25241512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2689278 + ... + 2689285.

Almost surely, 2^21514252 is an apocalyptic number.

It is an amenable number.

21514252 is a deficient number, since it is larger than the sum of its proper divisors (16135696).

21514252 is a wasteful number, since it uses less digits than its factorization.

21514252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378567 (or 5378565 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 21514252 is about 4638.3458258306. The cubic root of 21514252 is about 278.1263163175.

Adding to 21514252 its reverse (25241512), we get a palindrome (46755764).

The spelling of 21514252 in words is "twenty-one million, five hundred fourteen thousand, two hundred fifty-two".