223215723 has 16 divisors (see below), whose sum is σ = 332083200. Its totient is φ = 148183560.

The previous prime is 223215691. The next prime is 223215749. The reversal of 223215723 is 327512322.

It is a happy number.

It is not a de Polignac number, because 223215723 - 2⁵ = 223215691 is a prime.

It is a super-3 number, since 3×223215723³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (223214723) 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, 10843 + ... + 23748.

It is an arithmetic number, because the mean of its divisors is an integer number (20755200).

Almost surely, 2^223215723 is an apocalyptic number.

223215723 is a deficient number, since it is larger than the sum of its proper divisors (108867477).

223215723 is a wasteful number, since it uses less digits than its factorization.

223215723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34839 (or 34833 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 223215723 is about 14940.4057173826. The cubic root of 223215723 is about 606.6081777865.

It can be divided in two parts, 2232 and 15723, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 223215723 in words is "two hundred twenty-three million, two hundred fifteen thousand, seven hundred twenty-three".