31607201 has 2 divisors, whose sum is σ = 31607202. Its totient is φ = 31607200.

The previous prime is 31607153. The next prime is 31607207. The reversal of 31607201 is 10270613.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31584400 + 22801 = 5620^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 31607201 - 2⁶ = 31607137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31607207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803600 + 15803601.

It is an arithmetic number, because the mean of its divisors is an integer number (15803601).

Almost surely, 2^31607201 is an apocalyptic number.

It is an amenable number.

31607201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31607201 is an equidigital number, since it uses as much as digits as its factorization.

31607201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 31607201 is about 5622.0281927433. The cubic root of 31607201 is about 316.1758388182.

Adding to 31607201 its reverse (10270613), we get a palindrome (41877814).

The spelling of 31607201 in words is "thirty-one million, six hundred seven thousand, two hundred one".