8112187281 has 8 divisors (see below), whose sum is σ = 11799545184. Its totient is φ = 4916477120.

The previous prime is 8112187277. The next prime is 8112187301. The reversal of 8112187281 is 1827812118.

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

It is a cyclic number.

It is not a de Polignac number, because 8112187281 - 2² = 8112187277 is a prime.

It is a super-2 number, since 2×8112187281² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8112183281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122911896 + ... + 122911961.

It is an arithmetic number, because the mean of its divisors is an integer number (1474943148).

Almost surely, 2^8112187281 is an apocalyptic number.

It is an amenable number.

8112187281 is a deficient number, since it is larger than the sum of its proper divisors (3687357903).

8112187281 is a wasteful number, since it uses less digits than its factorization.

8112187281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245823871.

The product of its digits is 14336, while the sum is 39.

The square root of 8112187281 is about 90067.6816677325. The cubic root of 8112187281 is about 2009.3055760600.

Adding to 8112187281 its reverse (1827812118), we get a palindrome (9939999399).

It can be divided in two parts, 81121872 and 81, that added together give a triangular number (81121953 = T₁₂₇₃₇).

The spelling of 8112187281 in words is "eight billion, one hundred twelve million, one hundred eighty-seven thousand, two hundred eighty-one".