31320201 has 16 divisors (see below), whose sum is σ = 46012608. Its totient is φ = 18792000.

The previous prime is 31320193. The next prime is 31320217. The reversal of 31320201 is 10202313.

It is a happy number.

It is not a de Polignac number, because 31320201 - 2³ = 31320193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31320251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366 + ... + 8031.

It is an arithmetic number, because the mean of its divisors is an integer number (2875788).

Almost surely, 2^31320201 is an apocalyptic number.

It is an amenable number.

31320201 is a deficient number, since it is larger than the sum of its proper divisors (14692407).

31320201 is a wasteful number, since it uses less digits than its factorization.

31320201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9512.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31320201 is about 5596.4453897094. The cubic root of 31320201 is about 315.2159466592.

Adding to 31320201 its reverse (10202313), we get a palindrome (41522514).

The spelling of 31320201 in words is "thirty-one million, three hundred twenty thousand, two hundred one".