801585251 has 2 divisors, whose sum is σ = 801585252. Its totient is φ = 801585250.

The previous prime is 801585233. The next prime is 801585341. The reversal of 801585251 is 152585108.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801585251 is a prime.

It is not a weakly prime, because it can be changed into another prime (801585451) 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, 400792625 + 400792626.

It is an arithmetic number, because the mean of its divisors is an integer number (400792626).

Almost surely, 2^801585251 is an apocalyptic number.

801585251 is a deficient number, since it is larger than the sum of its proper divisors (1).

801585251 is an equidigital number, since it uses as much as digits as its factorization.

801585251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16000, while the sum is 35.

The square root of 801585251 is about 28312.2809218897. The cubic root of 801585251 is about 928.9305357653.

The spelling of 801585251 in words is "eight hundred one million, five hundred eighty-five thousand, two hundred fifty-one".