867216831 has 8 divisors (see below), whose sum is σ = 1245234480. Its totient is φ = 533671872.

The previous prime is 867216799. The next prime is 867216851. The reversal of 867216831 is 138612768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 867216831 - 2⁵ = 867216799 is a prime.

It is a super-2 number, since 2×867216831² = 1504130063939365122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867216851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11118126 + ... + 11118203.

It is an arithmetic number, because the mean of its divisors is an integer number (155654310).

Almost surely, 2^867216831 is an apocalyptic number.

867216831 is a deficient number, since it is larger than the sum of its proper divisors (378017649).

867216831 is a wasteful number, since it uses less digits than its factorization.

867216831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22236345.

The product of its digits is 96768, while the sum is 42.

The square root of 867216831 is about 29448.5454819079. The cubic root of 867216831 is about 953.6212044755.

The spelling of 867216831 in words is "eight hundred sixty-seven million, two hundred sixteen thousand, eight hundred thirty-one".