223172044820 has 48 divisors (see below), whose sum is σ = 484347698688. Its totient is φ = 86287697280.

The previous prime is 223172044801. The next prime is 223172044861. The reversal of 223172044820 is 28440271322.

It is a super-3 number, since 3×223172044820³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317867 + ... + 739853.

It is an arithmetic number, because the mean of its divisors is an integer number (10090577056).

Almost surely, 2^223172044820 is an apocalyptic number.

223172044820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223172044820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242173849344).

223172044820 is an abundant number, since it is smaller than the sum of its proper divisors (261175653868).

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

223172044820 is a wasteful number, since it uses less digits than its factorization.

223172044820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422880 (or 422878 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The spelling of 223172044820 in words is "two hundred twenty-three billion, one hundred seventy-two million, forty-four thousand, eight hundred twenty".