851222313 has 6 divisors (see below), whose sum is σ = 1229543354. Its totient is φ = 567481536.

The previous prime is 851222303. The next prime is 851222321. The reversal of 851222313 is 313222158.

It can be written as a sum of positive squares in only one way, i.e., 684502569 + 166719744 = 26163^2 + 12912^2 .

It is not a de Polignac number, because 851222313 - 2²¹ = 849125161 is a prime.

It is a super-2 number, since 2×851222313² = 1449158852298139938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851222303) 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 5 ways as a sum of consecutive naturals, for example, 47290120 + ... + 47290137.

Almost surely, 2^851222313 is an apocalyptic number.

It is an amenable number.

851222313 is a deficient number, since it is larger than the sum of its proper divisors (378321041).

851222313 is a wasteful number, since it uses less digits than its factorization.

851222313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94580263 (or 94580260 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 851222313 is about 29175.7144385532. The cubic root of 851222313 is about 947.7220817811.

The spelling of 851222313 in words is "eight hundred fifty-one million, two hundred twenty-two thousand, three hundred thirteen".