2312222100 has 144 divisors (see below), whose sum is σ = 7076422080. Its totient is φ = 581299200.

The previous prime is 2312222069. The next prime is 2312222117. The reversal of 2312222100 is 12222132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2312222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1327230 + ... + 1328970.

It is an arithmetic number, because the mean of its divisors is an integer number (49141820).

Almost surely, 2^2312222100 is an apocalyptic number.

2312222100 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 2312222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3538211040).

2312222100 is an abundant number, since it is smaller than the sum of its proper divisors (4764199980).

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

2312222100 is a wasteful number, since it uses less digits than its factorization.

2312222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010 (or 2003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2312222100 is about 48085.5706007530. The cubic root of 2312222100 is about 1322.3401440807.

Adding to 2312222100 its reverse (12222132), we get a palindrome (2324444232).

The spelling of 2312222100 in words is "two billion, three hundred twelve million, two hundred twenty-two thousand, one hundred".