31636061 has 2 divisors, whose sum is σ = 31636062. Its totient is φ = 31636060.

The previous prime is 31636049. The next prime is 31636067. The reversal of 31636061 is 16063613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30184036 + 1452025 = 5494^2 + 1205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31636061 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31636061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31636067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15818030 + 15818031.

It is an arithmetic number, because the mean of its divisors is an integer number (15818031).

Almost surely, 2^31636061 is an apocalyptic number.

It is an amenable number.

31636061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31636061 is an equidigital number, since it uses as much as digits as its factorization.

31636061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 31636061 is about 5624.5942964804. The cubic root of 31636061 is about 316.2720411453.

Adding to 31636061 its reverse (16063613), we get a palindrome (47699674).

The spelling of 31636061 in words is "thirty-one million, six hundred thirty-six thousand, sixty-one".