31252201 has 2 divisors, whose sum is σ = 31252202. Its totient is φ = 31252200.

The previous prime is 31252189. The next prime is 31252211. The reversal of 31252201 is 10225213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29986576 + 1265625 = 5476^2 + 1125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31252201 is a prime.

It is not a weakly prime, because it can be changed into another prime (31252211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626100 + 15626101.

It is an arithmetic number, because the mean of its divisors is an integer number (15626101).

Almost surely, 2^31252201 is an apocalyptic number.

It is an amenable number.

31252201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31252201 is an equidigital number, since it uses as much as digits as its factorization.

31252201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 31252201 is about 5590.3668037080. The cubic root of 31252201 is about 314.9876571967.

Adding to 31252201 its reverse (10225213), we get a palindrome (41477414).

The spelling of 31252201 in words is "thirty-one million, two hundred fifty-two thousand, two hundred one".