222315306440 has 32 divisors (see below), whose sum is σ = 501123948480. Its totient is φ = 88763543232.

The previous prime is 222315306413. The next prime is 222315306449. The reversal of 222315306440 is 44603513222.

It is a super-2 number, since 2×222315306440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222315306397 and 222315306406.

It is not an unprimeable number, because it can be changed into a prime (222315306449) 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, 5058452 + ... + 5102211.

It is an arithmetic number, because the mean of its divisors is an integer number (15660123390).

Almost surely, 2^222315306440 is an apocalyptic number.

222315306440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222315306440 is an abundant number, since it is smaller than the sum of its proper divisors (278808642040).

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

222315306440 is a wasteful number, since it uses less digits than its factorization.

222315306440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10161221 (or 10161217 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 222315306440 its reverse (44603513222), we get a palindrome (266918819662).

The spelling of 222315306440 in words is "two hundred twenty-two billion, three hundred fifteen million, three hundred six thousand, four hundred forty".