8271981237 has 16 divisors (see below), whose sum is σ = 11906780480. Its totient is φ = 5077994112.

The previous prime is 8271981197. The next prime is 8271981253. The reversal of 8271981237 is 7321891728.

It is a happy number.

It is not a de Polignac number, because 8271981237 - 2¹² = 8271977141 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 (8271981437) 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, 243343 + ... + 275244.

It is an arithmetic number, because the mean of its divisors is an integer number (744173780).

Almost surely, 2^8271981237 is an apocalyptic number.

It is an amenable number.

8271981237 is a deficient number, since it is larger than the sum of its proper divisors (3634799243).

8271981237 is a wasteful number, since it uses less digits than its factorization.

8271981237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519012.

The product of its digits is 338688, while the sum is 48.

The square root of 8271981237 is about 90950.4328576835. The cubic root of 8271981237 is about 2022.4129936907.

The spelling of 8271981237 in words is "eight billion, two hundred seventy-one million, nine hundred eighty-one thousand, two hundred thirty-seven".