222155440 has 40 divisors (see below), whose sum is σ = 556245648. Its totient is φ = 82026240.

The previous prime is 222155431. The next prime is 222155477. The reversal of 222155440 is 44551222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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, 105766 + ... + 107845.

Almost surely, 2^222155440 is an apocalyptic number.

222155440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222155440 is an abundant number, since it is smaller than the sum of its proper divisors (334090208).

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

222155440 is a wasteful number, since it uses less digits than its factorization.

222155440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213637 (or 213631 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 222155440 is about 14904.8797378577. The cubic root of 222155440 is about 605.6461825227.

The spelling of 222155440 in words is "two hundred twenty-two million, one hundred fifty-five thousand, four hundred forty".