31135201 has 2 divisors, whose sum is σ = 31135202. Its totient is φ = 31135200.

The previous prime is 31135199. The next prime is 31135207. The reversal of 31135201 is 10253113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 2405601 = 5360^2 + 1551^2 .

It is a cyclic number.

It is not a de Polignac number, because 31135201 - 2¹ = 31135199 is a prime.

Together with 31135199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31135207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15567600 + 15567601.

It is an arithmetic number, because the mean of its divisors is an integer number (15567601).

Almost surely, 2^31135201 is an apocalyptic number.

It is an amenable number.

31135201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31135201 is an equidigital number, since it uses as much as digits as its factorization.

31135201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31135201 is about 5579.8925616897. The cubic root of 31135201 is about 314.5940887375.

Adding to 31135201 its reverse (10253113), we get a palindrome (41388314).

The spelling of 31135201 in words is "thirty-one million, one hundred thirty-five thousand, two hundred one".