40240231 has 4 divisors (see below), whose sum is σ = 40260672. Its totient is φ = 40219792.

The previous prime is 40240223. The next prime is 40240237. The reversal of 40240231 is 13204204.

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

It is a cyclic number.

It is not a de Polignac number, because 40240231 - 2³ = 40240223 is a prime.

It is a super-2 number, since 2×40240231² = 3238552381866722, 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 (40240237) 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 3 ways as a sum of consecutive naturals, for example, 6910 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (10065168).

Almost surely, 2^40240231 is an apocalyptic number.

40240231 is a deficient number, since it is larger than the sum of its proper divisors (20441).

40240231 is a wasteful number, since it uses less digits than its factorization.

40240231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40240231 is about 6343.5188184477. The cubic root of 40240231 is about 342.6784719942.

Adding to 40240231 its reverse (13204204), we get a palindrome (53444435).

The spelling of 40240231 in words is "forty million, two hundred forty thousand, two hundred thirty-one".