39916231 has 4 divisors (see below), whose sum is σ = 39989752. Its totient is φ = 39842712.

The previous prime is 39916223. The next prime is 39916241. The reversal of 39916231 is 13261993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13261993 = 347 ⋅38219.

It is a cyclic number.

It is not a de Polignac number, because 39916231 - 2³ = 39916223 is a prime.

It is a super-2 number, since 2×39916231² = 3186610994490722, 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 (39916211) 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, 35940 + ... + 37033.

It is an arithmetic number, because the mean of its divisors is an integer number (9997438).

Almost surely, 2^39916231 is an apocalyptic number.

39916231 is a deficient number, since it is larger than the sum of its proper divisors (73521).

39916231 is an equidigital number, since it uses as much as digits as its factorization.

39916231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73520.

The product of its digits is 8748, while the sum is 34.

The square root of 39916231 is about 6317.9293285063. The cubic root of 39916231 is about 341.7562841921.

The spelling of 39916231 in words is "thirty-nine million, nine hundred sixteen thousand, two hundred thirty-one".