223891313 has 4 divisors (see below), whose sum is σ = 223923828. Its totient is φ = 223858800.

The previous prime is 223891303. The next prime is 223891319. The reversal of 223891313 is 313198322.

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 167521249 + 56370064 = 12943^2 + 7508^2 .

It is a cyclic number.

It is not a de Polignac number, because 223891313 - 2⁶ = 223891249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 223891313.

It is not an unprimeable number, because it can be changed into a prime (223891319) 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, 1406 + ... + 21207.

It is an arithmetic number, because the mean of its divisors is an integer number (55980957).

Almost surely, 2^223891313 is an apocalyptic number.

It is an amenable number.

223891313 is a deficient number, since it is larger than the sum of its proper divisors (32515).

223891313 is an equidigital number, since it uses as much as digits as its factorization.

223891313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32514.

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

The square root of 223891313 is about 14962.9981287174. The cubic root of 223891313 is about 607.2195529647.

The spelling of 223891313 in words is "two hundred twenty-three million, eight hundred ninety-one thousand, three hundred thirteen".