31330061 has 12 divisors (see below), whose sum is σ = 36578268. Its totient is φ = 26756352.

The previous prime is 31330043. The next prime is 31330073. The reversal of 31330061 is 16003313.

It can be written as a sum of positive squares in 2 ways, for example, as 13097161 + 18232900 = 3619^2 + 4270^2 .

It is not a de Polignac number, because 31330061 - 2¹⁰ = 31329037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14525 + ... + 16541.

It is an arithmetic number, because the mean of its divisors is an integer number (3048189).

Almost surely, 2^31330061 is an apocalyptic number.

It is an amenable number.

31330061 is a deficient number, since it is larger than the sum of its proper divisors (5248207).

31330061 is a wasteful number, since it uses less digits than its factorization.

31330061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348 (or 2341 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 31330061 is about 5597.3262366955. The cubic root of 31330061 is about 315.2490211930.

Adding to 31330061 its reverse (16003313), we get a palindrome (47333374).

The spelling of 31330061 in words is "thirty-one million, three hundred thirty thousand, sixty-one".