31885201 has 2 divisors, whose sum is σ = 31885202. Its totient is φ = 31885200.

The previous prime is 31885187. The next prime is 31885213. The reversal of 31885201 is 10258813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23270976 + 8614225 = 4824^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 31885201 - 2⁵ = 31885169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31885201.

It is not a weakly prime, because it can be changed into another prime (31885241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15942600 + 15942601.

It is an arithmetic number, because the mean of its divisors is an integer number (15942601).

Almost surely, 2^31885201 is an apocalyptic number.

It is an amenable number.

31885201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31885201 is an equidigital number, since it uses as much as digits as its factorization.

31885201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 31885201 is about 5646.6982387941. The cubic root of 31885201 is about 317.1001053812.

The spelling of 31885201 in words is "thirty-one million, eight hundred eighty-five thousand, two hundred one".