51271166 has 4 divisors (see below), whose sum is σ = 76906752. Its totient is φ = 25635582.

The previous prime is 51271153. The next prime is 51271169. The reversal of 51271166 is 66117215.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51271169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817790 + ... + 12817793.

It is an arithmetic number, because the mean of its divisors is an integer number (19226688).

Almost surely, 2^51271166 is an apocalyptic number.

51271166 is a deficient number, since it is larger than the sum of its proper divisors (25635586).

51271166 is a wasteful number, since it uses less digits than its factorization.

51271166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25635585.

The product of its digits is 2520, while the sum is 29.

The square root of 51271166 is about 7160.3886766013. The cubic root of 51271166 is about 371.4990704304.

The spelling of 51271166 in words is "fifty-one million, two hundred seventy-one thousand, one hundred sixty-six".