40340231 has 4 divisors (see below), whose sum is σ = 40942392. Its totient is φ = 39738072.

The previous prime is 40340221. The next prime is 40340239. The reversal of 40340231 is 13204304.

40340231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40340231 is a prime.

It is a super-2 number, since 2×40340231² = 3254668474266722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40340239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300980 + ... + 301113.

It is an arithmetic number, because the mean of its divisors is an integer number (10235598).

Almost surely, 2^40340231 is an apocalyptic number.

40340231 is a deficient number, since it is larger than the sum of its proper divisors (602161).

40340231 is an equidigital number, since it uses as much as digits as its factorization.

40340231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602160.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40340231 is about 6351.3959882848. The cubic root of 40340231 is about 342.9620977705.

Adding to 40340231 its reverse (13204304), we get a palindrome (53544535).

The spelling of 40340231 in words is "forty million, three hundred forty thousand, two hundred thirty-one".