39957331 has 16 divisors (see below), whose sum is σ = 42508800. Its totient is φ = 37503648.

The previous prime is 39957311. The next prime is 39957343. The reversal of 39957331 is 13375993.

39957331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 39957331 - 2¹¹ = 39955283 is a prime.

It is a super-2 number, since 2×39957331² = 3193176601287122, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 39957331 parts by 8939 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39957301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245056 + ... + 245218.

It is an arithmetic number, because the mean of its divisors is an integer number (2656800).

Almost surely, 2^39957331 is an apocalyptic number.

39957331 is a deficient number, since it is larger than the sum of its proper divisors (2551469).

39957331 is a wasteful number, since it uses less digits than its factorization.

39957331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its digits is 76545, while the sum is 40.

The square root of 39957331 is about 6321.1811396289. The cubic root of 39957331 is about 341.8735411306.

The spelling of 39957331 in words is "thirty-nine million, nine hundred fifty-seven thousand, three hundred thirty-one".