31938071 has 6 divisors (see below), whose sum is σ = 35105616. Its totient is φ = 29034500.

The previous prime is 31938061. The next prime is 31938079. The reversal of 31938071 is 17083913.

It is not a de Polignac number, because 31938071 - 2¹⁰ = 31937047 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 (31938079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131855 + ... + 132096.

It is an arithmetic number, because the mean of its divisors is an integer number (5850936).

Almost surely, 2^31938071 is an apocalyptic number.

31938071 is a deficient number, since it is larger than the sum of its proper divisors (3167545).

31938071 is a wasteful number, since it uses less digits than its factorization.

31938071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263973 (or 263962 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 31938071 is about 5651.3777966085. The cubic root of 31938071 is about 317.2752736338.

The spelling of 31938071 in words is "thirty-one million, nine hundred thirty-eight thousand, seventy-one".