31486201 has 2 divisors, whose sum is σ = 31486202. Its totient is φ = 31486200.

The previous prime is 31486163. The next prime is 31486229. The reversal of 31486201 is 10268413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28100601 + 3385600 = 5301^2 + 1840^2 .

It is an emirp because it is prime and its reverse (10268413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31486201 - 2²³ = 23097593 is a prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (31486271) 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, 15743100 + 15743101.

It is an arithmetic number, because the mean of its divisors is an integer number (15743101).

Almost surely, 2^31486201 is an apocalyptic number.

It is an amenable number.

31486201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31486201 is an equidigital number, since it uses as much as digits as its factorization.

31486201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 31486201 is about 5611.2566328765. The cubic root of 31486201 is about 315.7718570382.

The spelling of 31486201 in words is "thirty-one million, four hundred eighty-six thousand, two hundred one".