40312243 has 8 divisors (see below), whose sum is σ = 42848000. Its totient is φ = 37817928.

The previous prime is 40312241. The next prime is 40312271. The reversal of 40312243 is 34221304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40312243 - 2¹ = 40312241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 40312243.

It is not an unprimeable number, because it can be changed into a prime (40312241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8343 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (5356000).

Almost surely, 2^40312243 is an apocalyptic number.

40312243 is a deficient number, since it is larger than the sum of its proper divisors (2535757).

40312243 is a wasteful number, since it uses less digits than its factorization.

40312243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20721.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40312243 is about 6349.1923108377. The cubic root of 40312243 is about 342.8827638674.

Adding to 40312243 its reverse (34221304), we get a palindrome (74533547).

The spelling of 40312243 in words is "forty million, three hundred twelve thousand, two hundred forty-three".