8265143971 has 16 divisors (see below), whose sum is σ = 9535737024. Its totient is φ = 7017099264.

The previous prime is 8265143959. The next prime is 8265143977. The reversal of 8265143971 is 1793415628.

It is not a de Polignac number, because 8265143971 - 2¹³ = 8265135779 is a prime.

It is a super-2 number, since 2×8265143971² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8265143977) 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, 1795645 + ... + 1800241.

It is an arithmetic number, because the mean of its divisors is an integer number (595983564).

Almost surely, 2^8265143971 is an apocalyptic number.

8265143971 is a deficient number, since it is larger than the sum of its proper divisors (1270593053).

8265143971 is a wasteful number, since it uses less digits than its factorization.

8265143971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6990.

The product of its digits is 362880, while the sum is 46.

The square root of 8265143971 is about 90912.8372178539. The cubic root of 8265143971 is about 2021.8556267283.

The spelling of 8265143971 in words is "eight billion, two hundred sixty-five million, one hundred forty-three thousand, nine hundred seventy-one".