21314583 has 40 divisors (see below), whose sum is σ = 35231328. Its totient is φ = 12773376.

The previous prime is 21314569. The next prime is 21314603. The reversal of 21314583 is 38541312.

It is a happy number.

It is not a de Polignac number, because 21314583 - 2⁴ = 21314567 is a prime.

It is a super-2 number, since 2×21314583² = 908622896927778, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314543) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31335 + ... + 32007.

Almost surely, 2^21314583 is an apocalyptic number.

21314583 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21314583 is a deficient number, since it is larger than the sum of its proper divisors (13916745).

21314583 is a wasteful number, since it uses less digits than its factorization.

21314583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 716 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 21314583 is about 4616.7719241912. The cubic root of 21314583 is about 277.2632312043.

Adding to 21314583 its reverse (38541312), we get a palindrome (59855895).

The spelling of 21314583 in words is "twenty-one million, three hundred fourteen thousand, five hundred eighty-three".