22222440312 has 32 divisors (see below), whose sum is σ = 55734756480. Its totient is φ = 7383659360.

The previous prime is 22222440283. The next prime is 22222440347. The reversal of 22222440312 is 21304422222.

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

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, 1481178 + ... + 1496105.

It is an arithmetic number, because the mean of its divisors is an integer number (1741711140).

Almost surely, 2^22222440312 is an apocalyptic number.

It is an amenable number.

22222440312 is an abundant number, since it is smaller than the sum of its proper divisors (33512316168).

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

22222440312 is a wasteful number, since it uses less digits than its factorization.

22222440312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977603 (or 2977599 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22222440312 its reverse (21304422222), we get a palindrome (43526862534).

The spelling of 22222440312 in words is "twenty-two billion, two hundred twenty-two million, four hundred forty thousand, three hundred twelve".