223212378 has 32 divisors (see below), whose sum is σ = 466736256. Its totient is φ = 71031488.

The previous prime is 223212349. The next prime is 223212419. The reversal of 223212378 is 873212322.

It is a super-3 number, since 3×223212378³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88876 + ... + 91352.

It is an arithmetic number, because the mean of its divisors is an integer number (14585508).

Almost surely, 2^223212378 is an apocalyptic number.

223212378 is an abundant number, since it is smaller than the sum of its proper divisors (243523878).

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

223212378 is a wasteful number, since it uses less digits than its factorization.

223212378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158.

The product of its digits is 8064, while the sum is 30.

The square root of 223212378 is about 14940.2937722121. The cubic root of 223212378 is about 606.6051476617.

The spelling of 223212378 in words is "two hundred twenty-three million, two hundred twelve thousand, three hundred seventy-eight".