222100440 has 32 divisors (see below), whose sum is σ = 666301680. Its totient is φ = 59226752.

The previous prime is 222100423. The next prime is 222100507. The reversal of 222100440 is 44001222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925299 + ... + 925538.

Almost surely, 2^222100440 is an apocalyptic number.

222100440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222100440 is an abundant number, since it is smaller than the sum of its proper divisors (444201240).

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

222100440 is a wasteful number, since it uses less digits than its factorization.

222100440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850851 (or 1850847 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 222100440 is about 14903.0345903108. The cubic root of 222100440 is about 605.5961975671.

Adding to 222100440 its reverse (44001222), we get a palindrome (266101662).

The spelling of 222100440 in words is "two hundred twenty-two million, one hundred thousand, four hundred forty".