40432331 has 4 divisors (see below), whose sum is σ = 40479312. Its totient is φ = 40385352.

The previous prime is 40432319. The next prime is 40432333. The reversal of 40432331 is 13323404.

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-40432331 is a prime.

It is a super-2 number, since 2×40432331² = 3269546780187122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40432333) 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, 22175 + ... + 23928.

It is an arithmetic number, because the mean of its divisors is an integer number (10119828).

Almost surely, 2^40432331 is an apocalyptic number.

40432331 is a deficient number, since it is larger than the sum of its proper divisors (46981).

40432331 is an equidigital number, since it uses as much as digits as its factorization.

40432331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46980.

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

The square root of 40432331 is about 6358.6422292813. The cubic root of 40432331 is about 343.2229027656. Note that the first 3 decimals are identical.

Adding to 40432331 its reverse (13323404), we get a palindrome (53755735).

The spelling of 40432331 in words is "forty million, four hundred thirty-two thousand, three hundred thirty-one".