113215321 has 4 divisors (see below), whose sum is σ = 113248692. Its totient is φ = 113181952.

The previous prime is 113215313. The next prime is 113215331. The reversal of 113215321 is 123512311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7639696 + 105575625 = 2764^2 + 10275^2 .

It is a cyclic number.

It is not a de Polignac number, because 113215321 - 2³ = 113215313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113215331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10936 + ... + 18601.

It is an arithmetic number, because the mean of its divisors is an integer number (28312173).

Almost surely, 2^113215321 is an apocalyptic number.

It is an amenable number.

113215321 is a deficient number, since it is larger than the sum of its proper divisors (33371).

113215321 is an equidigital number, since it uses as much as digits as its factorization.

113215321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33370.

The product of its digits is 180, while the sum is 19.

The square root of 113215321 is about 10640.2688405886. The cubic root of 113215321 is about 483.7656940827.

Adding to 113215321 its reverse (123512311), we get a palindrome (236727632).

The spelling of 113215321 in words is "one hundred thirteen million, two hundred fifteen thousand, three hundred twenty-one".