222311440 has 80 divisors (see below), whose sum is σ = 560182896. Its totient is φ = 81561600.

The previous prime is 222311393. The next prime is 222311459. The reversal of 222311440 is 44113222.

It can be written as a sum of positive squares in 8 ways, for example, as 27541504 + 194769936 = 5248^2 + 13956^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187650 + ... + 188830.

Almost surely, 2^222311440 is an apocalyptic number.

222311440 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 222311440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280091448).

222311440 is an abundant number, since it is smaller than the sum of its proper divisors (337871456).

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

222311440 is a wasteful number, since it uses less digits than its factorization.

222311440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 222311440 is about 14910.1120049448. The cubic root of 222311440 is about 605.7879131625.

Adding to 222311440 its reverse (44113222), we get a palindrome (266424662).

The spelling of 222311440 in words is "two hundred twenty-two million, three hundred eleven thousand, four hundred forty".