31486071 has 4 divisors (see below), whose sum is σ = 41981432. Its totient is φ = 20990712.

The previous prime is 31486033. The next prime is 31486087. The reversal of 31486071 is 17068413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31486071 - 2¹³ = 31477879 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 (31486271) 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 3 ways as a sum of consecutive naturals, for example, 5247676 + ... + 5247681.

It is an arithmetic number, because the mean of its divisors is an integer number (10495358).

Almost surely, 2^31486071 is an apocalyptic number.

31486071 is a deficient number, since it is larger than the sum of its proper divisors (10495361).

31486071 is a wasteful number, since it uses less digits than its factorization.

31486071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10495360.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 31486071 is about 5611.2450490065. The cubic root of 31486071 is about 315.7714224521.

The spelling of 31486071 in words is "thirty-one million, four hundred eighty-six thousand, seventy-one".