223478172 has 18 divisors (see below), whose sum is σ = 564903248. Its totient is φ = 74492712.

The previous prime is 223478153. The next prime is 223478183. The reversal of 223478172 is 271874322.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×223478172³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6207727 = 223478172 / (2 + 2 + 3 + 4 + 7 + 8 + 1 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3103828 + ... + 3103899.

Almost surely, 2^223478172 is an apocalyptic number.

It is an amenable number.

223478172 is an abundant number, since it is smaller than the sum of its proper divisors (341425076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223478172 is a wasteful number, since it uses less digits than its factorization.

223478172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207737 (or 6207732 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 223478172 is about 14949.1863323727. The cubic root of 223478172 is about 606.8458273465.

The spelling of 223478172 in words is "two hundred twenty-three million, four hundred seventy-eight thousand, one hundred seventy-two".