21314310 has 32 divisors (see below), whose sum is σ = 51293952. Its totient is φ = 5668320.

The previous prime is 21314303. The next prime is 21314327. The reversal of 21314310 is 1341312.

It is a super-2 number, since 2×21314310² = 908599621552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21314310.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14007 + ... + 15453.

It is an arithmetic number, because the mean of its divisors is an integer number (1602936).

Almost surely, 2^21314310 is an apocalyptic number.

21314310 is an abundant number, since it is smaller than the sum of its proper divisors (29979642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21314310 is a wasteful number, since it uses less digits than its factorization.

21314310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21314310 is about 4616.7423579836. The cubic root of 21314310 is about 277.2620474578.

Adding to 21314310 its reverse (1341312), we get a palindrome (22655622).

It can be divided in two parts, 2131 and 4310, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 21314310 in words is "twenty-one million, three hundred fourteen thousand, three hundred ten".