222633540 has 72 divisors (see below), whose sum is σ = 680709120. Its totient is φ = 58895424.

The previous prime is 222633539. The next prime is 222633557. The reversal of 222633540 is 45336222.

222633540 is a `hidden beast` number, since 2 + 22 + 633 + 5 + 4 + 0 = 666.

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, 17991 + ... + 27729.

Almost surely, 2^222633540 is an apocalyptic number.

222633540 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 222633540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340354560).

222633540 is an abundant number, since it is smaller than the sum of its proper divisors (458075580).

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

222633540 is a wasteful number, since it uses less digits than its factorization.

222633540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881 (or 9876 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 222633540 is about 14920.9094897060. The cubic root of 222633540 is about 606.0803409478.

Adding to 222633540 its reverse (45336222), we get a palindrome (267969762).

The spelling of 222633540 in words is "two hundred twenty-two million, six hundred thirty-three thousand, five hundred forty".