31132071 has 6 divisors (see below), whose sum is σ = 44968560. Its totient is φ = 20754708.

The previous prime is 31132067. The next prime is 31132093. The reversal of 31132071 is 17023113.

It is not a de Polignac number, because 31132071 - 2² = 31132067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31136071) 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, 1729551 + ... + 1729568.

It is an arithmetic number, because the mean of its divisors is an integer number (7494760).

Almost surely, 2^31132071 is an apocalyptic number.

31132071 is a deficient number, since it is larger than the sum of its proper divisors (13836489).

31132071 is a wasteful number, since it uses less digits than its factorization.

31132071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459125 (or 3459122 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 31132071 is about 5579.6120832904. The cubic root of 31132071 is about 314.5835464096.

Adding to 31132071 its reverse (17023113), we get a palindrome (48155184).

It can be divided in two parts, 3113 and 2071, that added together give a square (5184 = 72²).

The spelling of 31132071 in words is "thirty-one million, one hundred thirty-two thousand, seventy-one".