21313113 has 8 divisors (see below), whose sum is σ = 28515648. Its totient is φ = 14159664.

The previous prime is 21313093. The next prime is 21313129. The reversal of 21313113 is 31131312.

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

It is not a de Polignac number, because 21313113 - 2¹⁸ = 21050969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21313092 and 21313101.

It is not an unprimeable number, because it can be changed into a prime (21313133) 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, 11245 + ... + 13002.

It is an arithmetic number, because the mean of its divisors is an integer number (3564456).

Almost surely, 2^21313113 is an apocalyptic number.

It is an amenable number.

21313113 is a deficient number, since it is larger than the sum of its proper divisors (7202535).

21313113 is a wasteful number, since it uses less digits than its factorization.

21313113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24543.

The product of its digits is 54, while the sum is 15.

The square root of 21313113 is about 4616.6127192997. The cubic root of 21313113 is about 277.2568570656.

Adding to 21313113 its reverse (31131312), we get a palindrome (52444425).

The spelling of 21313113 in words is "twenty-one million, three hundred thirteen thousand, one hundred thirteen".