10031391 has 16 divisors (see below), whose sum is σ = 14944000. Its totient is φ = 6650424.

The previous prime is 10031369. The next prime is 10031407. The reversal of 10031391 is 19313001.

10031391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10031391 - 2⁶ = 10031327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031191) 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 15 ways as a sum of consecutive naturals, for example, 4440 + ... + 6306.

It is an arithmetic number, because the mean of its divisors is an integer number (934000).

Almost surely, 2^10031391 is an apocalyptic number.

10031391 is a deficient number, since it is larger than the sum of its proper divisors (4912609).

10031391 is a wasteful number, since it uses less digits than its factorization.

10031391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 10031391 is about 3167.2371240562. The cubic root of 10031391 is about 215.6686663928.

Adding to 10031391 its reverse (19313001), we get a palindrome (29344392).

The spelling of 10031391 in words is "ten million, thirty-one thousand, three hundred ninety-one".