222222100340 has 12 divisors (see below), whose sum is σ = 466666410756. Its totient is φ = 88888840128.

The previous prime is 222222100291. The next prime is 222222100393. The reversal of 222222100340 is 43001222222.

It can be written as a sum of positive squares in 2 ways, for example, as 140830575076 + 81391525264 = 375274^2 + 285292^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11111105017 = 222222100340 / (2 + 2 + 2 + 2 + 2 + 2 + 1 + 0 + 0 + 3 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555552489 + ... + 5555552528.

It is an arithmetic number, because the mean of its divisors is an integer number (38888867563).

Almost surely, 2^222222100340 is an apocalyptic number.

222222100340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222100340 is an abundant number, since it is smaller than the sum of its proper divisors (244444310416).

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

222222100340 is a wasteful number, since it uses less digits than its factorization.

222222100340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111105026 (or 11111105024 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 222222100340 its reverse (43001222222), we get a palindrome (265223322562).

The spelling of 222222100340 in words is "two hundred twenty-two billion, two hundred twenty-two million, one hundred thousand, three hundred forty".