851143463 has 4 divisors (see below), whose sum is σ = 859570728. Its totient is φ = 842716200.

The previous prime is 851143453. The next prime is 851143493. The reversal of 851143463 is 364341158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364341158 = 2 ⋅182170579.

It is a cyclic number.

It is not a de Polignac number, because 851143463 - 2²⁰ = 850094887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851143453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4213481 + ... + 4213682.

It is an arithmetic number, because the mean of its divisors is an integer number (214892682).

Almost surely, 2^851143463 is an apocalyptic number.

851143463 is a deficient number, since it is larger than the sum of its proper divisors (8427265).

851143463 is a wasteful number, since it uses less digits than its factorization.

851143463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8427264.

The product of its digits is 34560, while the sum is 35.

The square root of 851143463 is about 29174.3631121572. The cubic root of 851143463 is about 947.6928179047.

The spelling of 851143463 in words is "eight hundred fifty-one million, one hundred forty-three thousand, four hundred sixty-three".