812616271 has 4 divisors (see below), whose sum is σ = 816826912. Its totient is φ = 808405632.

The previous prime is 812616257. The next prime is 812616281. The reversal of 812616271 is 172616218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172616218 = 2 ⋅86308109.

It is a cyclic number.

It is not a de Polignac number, because 812616271 - 2¹³ = 812608079 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 (812616241) 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, 2105031 + ... + 2105416.

It is an arithmetic number, because the mean of its divisors is an integer number (204206728).

Almost surely, 2^812616271 is an apocalyptic number.

812616271 is a deficient number, since it is larger than the sum of its proper divisors (4210641).

812616271 is a wasteful number, since it uses less digits than its factorization.

812616271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210640.

The product of its digits is 8064, while the sum is 34.

The square root of 812616271 is about 28506.4250827774. The cubic root of 812616271 is about 933.1722981382.

The spelling of 812616271 in words is "eight hundred twelve million, six hundred sixteen thousand, two hundred seventy-one".