31028201 has 2 divisors, whose sum is σ = 31028202. Its totient is φ = 31028200.

The previous prime is 31028149. The next prime is 31028203. The reversal of 31028201 is 10282013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 2725801 = 5320^2 + 1651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31028201 is a prime.

Together with 31028203, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31028201.

It is not a weakly prime, because it can be changed into another prime (31028203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15514100 + 15514101.

It is an arithmetic number, because the mean of its divisors is an integer number (15514101).

Almost surely, 2^31028201 is an apocalyptic number.

It is an amenable number.

31028201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31028201 is an equidigital number, since it uses as much as digits as its factorization.

31028201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 31028201 is about 5570.2963116876. The cubic root of 31028201 is about 314.2332945140.

The spelling of 31028201 in words is "thirty-one million, twenty-eight thousand, two hundred one".