40343231 has 8 divisors (see below), whose sum is σ = 41050464. Its totient is φ = 39640320.

The previous prime is 40343207. The next prime is 40343239. The reversal of 40343231 is 13234304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40343231 is a prime.

It is a super-2 number, since 2×40343231² = 3255152575038722, 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 (40343239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21815 + ... + 23591.

It is an arithmetic number, because the mean of its divisors is an integer number (5131308).

Almost surely, 2^40343231 is an apocalyptic number.

40343231 is a deficient number, since it is larger than the sum of its proper divisors (707233).

40343231 is a wasteful number, since it uses less digits than its factorization.

40343231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 40343231 is about 6351.6321524471. The cubic root of 40343231 is about 342.9705992984.

Adding to 40343231 its reverse (13234304), we get a palindrome (53577535).

It can be divided in two parts, 403 and 43231, that added together give a palindrome (43634).

The spelling of 40343231 in words is "forty million, three hundred forty-three thousand, two hundred thirty-one".