43140312 has 48 divisors (see below), whose sum is σ = 117234000. Its totient is φ = 14331456.

The previous prime is 43140311. The next prime is 43140353. The reversal of 43140312 is 21304134.

It is a super-2 number, since 2×43140312² = 3722173038914688, which contains 22 as substring.

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 (43140311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25014 + ... + 26682.

It is an arithmetic number, because the mean of its divisors is an integer number (2442375).

Almost surely, 2^43140312 is an apocalyptic number.

It is an amenable number.

43140312 is an abundant number, since it is smaller than the sum of its proper divisors (74093688).

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

43140312 is a wasteful number, since it uses less digits than its factorization.

43140312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040 (or 2033 counting only the distinct ones).

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

The square root of 43140312 is about 6568.1285005700. The cubic root of 43140312 is about 350.7204533886.

Adding to 43140312 its reverse (21304134), we get a palindrome (64444446).

The spelling of 43140312 in words is "forty-three million, one hundred forty thousand, three hundred twelve".