31290201 has 6 divisors (see below), whose sum is σ = 45196970. Its totient is φ = 20860128.

The previous prime is 31290199. The next prime is 31290221. The reversal of 31290201 is 10209213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24000201 + 7290000 = 4899^2 + 2700^2 .

It is not a de Polignac number, because 31290201 - 2¹ = 31290199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31290221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1738336 + ... + 1738353.

Almost surely, 2^31290201 is an apocalyptic number.

It is an amenable number.

31290201 is a deficient number, since it is larger than the sum of its proper divisors (13906769).

31290201 is a wasteful number, since it uses less digits than its factorization.

31290201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476695 (or 3476692 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 31290201 is about 5593.7644748416. The cubic root of 31290201 is about 315.1152714933.

Adding to 31290201 its reverse (10209213), we get a palindrome (41499414).

The spelling of 31290201 in words is "thirty-one million, two hundred ninety thousand, two hundred one".