21514312 has 8 divisors (see below), whose sum is σ = 40339350. Its totient is φ = 10757152.

The previous prime is 21514301. The next prime is 21514369. The reversal of 21514312 is 21341512.

It can be written as a sum of positive squares in only one way, i.e., 19061956 + 2452356 = 4366^2 + 1566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21514312.

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, 1344637 + ... + 1344652.

Almost surely, 2^21514312 is an apocalyptic number.

It is an amenable number.

21514312 is a deficient number, since it is larger than the sum of its proper divisors (18825038).

21514312 is a wasteful number, since it uses less digits than its factorization.

21514312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689295 (or 2689291 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 21514312 is about 4638.3522936491. The cubic root of 21514312 is about 278.1265748680.

Adding to 21514312 its reverse (21341512), we get a palindrome (42855824).

The spelling of 21514312 in words is "twenty-one million, five hundred fourteen thousand, three hundred twelve".