21462313 has 8 divisors (see below), whose sum is σ = 22765320. Its totient is φ = 20163840.

The previous prime is 21462307. The next prime is 21462319. The reversal of 21462313 is 31326412.

It is an interprime number because it is at equal distance from previous prime (21462307) and next prime (21462319).

It can be written as a sum of positive squares in 4 ways, for example, as 10419984 + 11042329 = 3228^2 + 3323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21462313 - 2⁵ = 21462281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21462319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17583 + ... + 18763.

It is an arithmetic number, because the mean of its divisors is an integer number (2845665).

Almost surely, 2^21462313 is an apocalyptic number.

It is an amenable number.

21462313 is a deficient number, since it is larger than the sum of its proper divisors (1303007).

21462313 is a wasteful number, since it uses less digits than its factorization.

21462313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267.

The product of its digits is 864, while the sum is 22.

The square root of 21462313 is about 4632.7435715783. The cubic root of 21462313 is about 277.9023214967.

Adding to 21462313 its reverse (31326412), we get a palindrome (52788725).

The spelling of 21462313 in words is "twenty-one million, four hundred sixty-two thousand, three hundred thirteen".