223664857 has 16 divisors (see below), whose sum is σ = 255483648. Its totient is φ = 194230080.

The previous prime is 223664821. The next prime is 223664863. The reversal of 223664857 is 758466322.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223664857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223664807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12108 + ... + 24370.

It is an arithmetic number, because the mean of its divisors is an integer number (15967728).

Almost surely, 2^223664857 is an apocalyptic number.

It is an amenable number.

223664857 is a deficient number, since it is larger than the sum of its proper divisors (31818791).

223664857 is a wasteful number, since it uses less digits than its factorization.

223664857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360.

The product of its digits is 483840, while the sum is 43.

The square root of 223664857 is about 14955.4290142409. The cubic root of 223664857 is about 607.0147588073.

The spelling of 223664857 in words is "two hundred twenty-three million, six hundred sixty-four thousand, eight hundred fifty-seven".