21314312 has 16 divisors (see below), whose sum is σ = 40815360. Its totient is φ = 10430224.

The previous prime is 21314303. The next prime is 21314327. The reversal of 21314312 is 21341312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27968 + ... + 28719.

It is an arithmetic number, because the mean of its divisors is an integer number (2550960).

Almost surely, 2^21314312 is an apocalyptic number.

It is an amenable number.

21314312 is a deficient number, since it is larger than the sum of its proper divisors (19501048).

21314312 is a wasteful number, since it uses less digits than its factorization.

21314312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56740 (or 56736 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 21314312 is about 4616.7425745865. The cubic root of 21314312 is about 277.2620561300.

Adding to 21314312 its reverse (21341312), we get a palindrome (42655624).

Subtracting 21314312 from its reverse (21341312), we obtain a cube (27000 = 30³).

The spelling of 21314312 in words is "twenty-one million, three hundred fourteen thousand, three hundred twelve".