223907881 has 8 divisors (see below), whose sum is σ = 231875784. Its totient is φ = 216078720.

The previous prime is 223907857. The next prime is 223907899. The reversal of 223907881 is 188709322.

It can be written as a sum of positive squares in 4 ways, for example, as 28355625 + 195552256 = 5325^2 + 13984^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223907881 is a prime.

It is a super-2 number, since 2×223907881² = 100269478347820322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223907851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31396 + ... + 37861.

It is an arithmetic number, because the mean of its divisors is an integer number (28984473).

Almost surely, 2^223907881 is an apocalyptic number.

It is an amenable number.

223907881 is a deficient number, since it is larger than the sum of its proper divisors (7967903).

223907881 is an equidigital number, since it uses as much as digits as its factorization.

223907881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69371.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 223907881 is about 14963.5517508378. The cubic root of 223907881 is about 607.2345307163.

The spelling of 223907881 in words is "two hundred twenty-three million, nine hundred seven thousand, eight hundred eighty-one".