43213140 has 36 divisors (see below), whose sum is σ = 131080404. Its totient is φ = 11523456.

The previous prime is 43213109. The next prime is 43213141. The reversal of 43213140 is 4131234.

It can be written as a sum of positive squares in 2 ways, for example, as 25522704 + 17690436 = 5052^2 + 4206^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43213141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119857 + ... + 120216.

Almost surely, 2^43213140 is an apocalyptic number.

It is an amenable number.

43213140 is an abundant number, since it is smaller than the sum of its proper divisors (87867264).

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

43213140 is a wasteful number, since it uses less digits than its factorization.

43213140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240088 (or 240083 counting only the distinct ones).

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

The square root of 43213140 is about 6573.6702077302. The cubic root of 43213140 is about 350.9177005283.

Adding to 43213140 its reverse (4131234), we get a palindrome (47344374).

The spelling of 43213140 in words is "forty-three million, two hundred thirteen thousand, one hundred forty".