31995101 has 2 divisors, whose sum is σ = 31995102. Its totient is φ = 31995100.

The previous prime is 31995059. The next prime is 31995133. The reversal of 31995101 is 10159913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28879876 + 3115225 = 5374^2 + 1765^2 .

It is an emirp because it is prime and its reverse (10159913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31995101 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31995151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15997550 + 15997551.

It is an arithmetic number, because the mean of its divisors is an integer number (15997551).

Almost surely, 2^31995101 is an apocalyptic number.

It is an amenable number.

31995101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31995101 is an equidigital number, since it uses as much as digits as its factorization.

31995101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 31995101 is about 5656.4212184030. The cubic root of 31995101 is about 317.4640081548.

The spelling of 31995101 in words is "thirty-one million, nine hundred ninety-five thousand, one hundred one".