851305224397 has 4 divisors (see below), whose sum is σ = 851511505536. Its totient is φ = 851098943260.

The previous prime is 851305224379. The next prime is 851305224401. The reversal of 851305224397 is 793422503158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 851305224397 - 2¹⁵ = 851305191629 is a prime.

It is a super-3 number, since 3×851305224397³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851305224397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851305224307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103134379 + ... + 103142632.

It is an arithmetic number, because the mean of its divisors is an integer number (212877876384).

Almost surely, 2^851305224397 is an apocalyptic number.

It is an amenable number.

851305224397 is a deficient number, since it is larger than the sum of its proper divisors (206281139).

851305224397 is a wasteful number, since it uses less digits than its factorization.

851305224397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206281138.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 851305224397 in words is "eight hundred fifty-one billion, three hundred five million, two hundred twenty-four thousand, three hundred ninety-seven".