851197331 has 4 divisors (see below), whose sum is σ = 867257712. Its totient is φ = 835136952.

The previous prime is 851197313. The next prime is 851197337. The reversal of 851197331 is 133791158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133791158 = 2 ⋅66895579.

It is a cyclic number.

It is not a de Polignac number, because 851197331 - 2⁶ = 851197267 is a prime.

It is a super-2 number, since 2×851197331² = 1449073792603047122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851197337) 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, 8030111 + ... + 8030216.

It is an arithmetic number, because the mean of its divisors is an integer number (216814428).

Almost surely, 2^851197331 is an apocalyptic number.

851197331 is a deficient number, since it is larger than the sum of its proper divisors (16060381).

851197331 is a wasteful number, since it uses less digits than its factorization.

851197331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16060380.

The product of its digits is 22680, while the sum is 38.

The square root of 851197331 is about 29175.2863053647. The cubic root of 851197331 is about 947.7128103196.

The spelling of 851197331 in words is "eight hundred fifty-one million, one hundred ninety-seven thousand, three hundred thirty-one".