816051871 has 16 divisors (see below), whose sum is σ = 837008640. Its totient is φ = 795474880.

The previous prime is 816051869. The next prime is 816051883. The reversal of 816051871 is 178150618.

It is a cyclic number.

It is not a de Polignac number, because 816051871 - 2¹ = 816051869 is a prime.

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 816051871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816054871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2623806 + ... + 2624116.

It is an arithmetic number, because the mean of its divisors is an integer number (52313040).

Almost surely, 2^816051871 is an apocalyptic number.

816051871 is a deficient number, since it is larger than the sum of its proper divisors (20956769).

816051871 is a wasteful number, since it uses less digits than its factorization.

816051871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734.

The product of its (nonzero) digits is 13440, while the sum is 37.

The square root of 816051871 is about 28566.6216238462. The cubic root of 816051871 is about 934.4855457714.

It can be divided in two parts, 8160 and 51871, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 816051871 in words is "eight hundred sixteen million, fifty-one thousand, eight hundred seventy-one".