222213840 has 40 divisors (see below), whose sum is σ = 688863648. Its totient is φ = 59256960.

The previous prime is 222213839. The next prime is 222213847. The reversal of 222213840 is 48312222.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 222213840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222213847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462706 + ... + 463185.

Almost surely, 2^222213840 is an apocalyptic number.

222213840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222213840 is an abundant number, since it is smaller than the sum of its proper divisors (466649808).

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

222213840 is a wasteful number, since it uses less digits than its factorization.

222213840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925907 (or 925901 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 222213840 is about 14906.8386990669. The cubic root of 222213840 is about 605.6992484273.

The spelling of 222213840 in words is "two hundred twenty-two million, two hundred thirteen thousand, eight hundred forty".