223981313 has 4 divisors (see below), whose sum is σ = 230034900. Its totient is φ = 217927728.

The previous prime is 223981309. The next prime is 223981333. The reversal of 223981313 is 313189322.

223981313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 88887184 + 135094129 = 9428^2 + 11623^2 .

It is a cyclic number.

It is not a de Polignac number, because 223981313 - 2² = 223981309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223981313.

It is not an unprimeable number, because it can be changed into a prime (223981333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3026738 + ... + 3026811.

It is an arithmetic number, because the mean of its divisors is an integer number (57508725).

Almost surely, 2^223981313 is an apocalyptic number.

It is an amenable number.

223981313 is a deficient number, since it is larger than the sum of its proper divisors (6053587).

223981313 is an equidigital number, since it uses as much as digits as its factorization.

223981313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6053586.

The product of its digits is 7776, while the sum is 32.

The square root of 223981313 is about 14966.0052452216. The cubic root of 223981313 is about 607.3009055906.

The spelling of 223981313 in words is "two hundred twenty-three million, nine hundred eighty-one thousand, three hundred thirteen".