31366201 has 4 divisors (see below), whose sum is σ = 31643892. Its totient is φ = 31088512.

The previous prime is 31366193. The next prime is 31366217. The reversal of 31366201 is 10266313.

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 9734400 + 21631801 = 3120^2 + 4651^2 .

It is a cyclic number.

It is not a de Polignac number, because 31366201 - 2³ = 31366193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31366001) 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, 138676 + ... + 138901.

It is an arithmetic number, because the mean of its divisors is an integer number (7910973).

Almost surely, 2^31366201 is an apocalyptic number.

It is an amenable number.

31366201 is a deficient number, since it is larger than the sum of its proper divisors (277691).

31366201 is a wasteful number, since it uses less digits than its factorization.

31366201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277690.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 31366201 is about 5600.5536333473. The cubic root of 31366201 is about 315.3701904612.

The spelling of 31366201 in words is "thirty-one million, three hundred sixty-six thousand, two hundred one".