40443231 has 4 divisors (see below), whose sum is σ = 53924312. Its totient is φ = 26962152.

The previous prime is 40443217. The next prime is 40443283. The reversal of 40443231 is 13234404.

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

It is not a de Polignac number, because 40443231 - 2⁵ = 40443199 is a prime.

It is a super-2 number, since 2×40443231² = 3271309867438722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40443198 and 40443207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6740536 + ... + 6740541.

It is an arithmetic number, because the mean of its divisors is an integer number (13481078).

Almost surely, 2^40443231 is an apocalyptic number.

40443231 is a deficient number, since it is larger than the sum of its proper divisors (13481081).

40443231 is a wasteful number, since it uses less digits than its factorization.

40443231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13481080.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 40443231 is about 6359.4992727415. The cubic root of 40443231 is about 343.2537427181.

Adding to 40443231 its reverse (13234404), we get a palindrome (53677635).

The spelling of 40443231 in words is "forty million, four hundred forty-three thousand, two hundred thirty-one".