798815251 has 4 divisors (see below), whose sum is σ = 860262592. Its totient is φ = 737367912.

The previous prime is 798815221. The next prime is 798815263. The reversal of 798815251 is 152518897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152518897 = 5879 ⋅25943.

It is a cyclic number.

It is not a de Polignac number, because 798815251 - 2⁷ = 798815123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (798815201) 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 in 3 ways as a sum of consecutive naturals, for example, 30723651 + ... + 30723676.

It is an arithmetic number, because the mean of its divisors is an integer number (215065648).

Almost surely, 2^798815251 is an apocalyptic number.

798815251 is a deficient number, since it is larger than the sum of its proper divisors (61447341).

798815251 is a wasteful number, since it uses less digits than its factorization.

798815251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61447340.

The product of its digits is 201600, while the sum is 46.

The square root of 798815251 is about 28263.3198863828. The cubic root of 798815251 is about 927.8592805076.

The spelling of 798815251 in words is "seven hundred ninety-eight million, eight hundred fifteen thousand, two hundred fifty-one".