223021764 has 72 divisors (see below), whose sum is σ = 646184448. Its totient is φ = 63532800.

The previous prime is 223021741. The next prime is 223021787. The reversal of 223021764 is 467120322.

It is an interprime number because it is at equal distance from previous prime (223021741) and next prime (223021787).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99949 + ... + 102155.

It is an arithmetic number, because the mean of its divisors is an integer number (8974784).

Almost surely, 2^223021764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223021764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323092224).

223021764 is an abundant number, since it is smaller than the sum of its proper divisors (423162684).

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

223021764 is a wasteful number, since it uses less digits than its factorization.

223021764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 223021764 is about 14933.9132179078. The cubic root of 223021764 is about 606.4324267103.

The spelling of 223021764 in words is "two hundred twenty-three million, twenty-one thousand, seven hundred sixty-four".