31132061 has 4 divisors (see below), whose sum is σ = 31147932. Its totient is φ = 31116192.

The previous prime is 31132039. The next prime is 31132063. The reversal of 31132061 is 16023113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21335161 + 9796900 = 4619^2 + 3130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31132061 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 (31132063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4496 + ... + 9081.

It is an arithmetic number, because the mean of its divisors is an integer number (7786983).

Almost surely, 2^31132061 is an apocalyptic number.

It is an amenable number.

31132061 is a deficient number, since it is larger than the sum of its proper divisors (15871).

31132061 is a wasteful number, since it uses less digits than its factorization.

31132061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 31132061 is about 5579.6111871707. The cubic root of 31132061 is about 314.5835127269.

Adding to 31132061 its reverse (16023113), we get a palindrome (47155174).

The spelling of 31132061 in words is "thirty-one million, one hundred thirty-two thousand, sixty-one".