43312122 has 48 divisors (see below), whose sum is σ = 108064320. Its totient is φ = 12280896.

The previous prime is 43312111. The next prime is 43312123. The reversal of 43312122 is 22121334.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 43312095 and 43312104.

It is not an unprimeable number, because it can be changed into a prime (43312123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16278 + ... + 18750.

It is an arithmetic number, because the mean of its divisors is an integer number (2251340).

Almost surely, 2^43312122 is an apocalyptic number.

43312122 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 43312122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54032160).

43312122 is an abundant number, since it is smaller than the sum of its proper divisors (64752198).

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

43312122 is a wasteful number, since it uses less digits than its factorization.

43312122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627 (or 2624 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 43312122 is about 6581.1945724162. The cubic root of 43312122 is about 351.1854281153.

Adding to 43312122 its reverse (22121334), we get a palindrome (65433456).

It can be divided in two parts, 43312 and 122, that added together give a palindrome (43434).

The spelling of 43312122 in words is "forty-three million, three hundred twelve thousand, one hundred twenty-two".