851357273 has 8 divisors (see below), whose sum is σ = 922273800. Its totient is φ = 785866224.

The previous prime is 851357261. The next prime is 851357291. The reversal of 851357273 is 372753158.

It can be written as a sum of positive squares in 4 ways, for example, as 45535504 + 805821769 = 6748^2 + 28387^2 .

It is not a de Polignac number, because 851357273 - 2¹⁰ = 851356249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 851357273.

It is not an unprimeable number, because it can be changed into a prime (851359273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191558 + ... + 195951.

It is an arithmetic number, because the mean of its divisors is an integer number (115284225).

Almost surely, 2^851357273 is an apocalyptic number.

It is an amenable number.

851357273 is a deficient number, since it is larger than the sum of its proper divisors (70916527).

851357273 is an equidigital number, since it uses as much as digits as its factorization.

851357273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387548 (or 387522 counting only the distinct ones).

The product of its digits is 176400, while the sum is 41.

The square root of 851357273 is about 29178.0272294067. The cubic root of 851357273 is about 947.7721657647.

The spelling of 851357273 in words is "eight hundred fifty-one million, three hundred fifty-seven thousand, two hundred seventy-three".