51271857 has 24 divisors (see below), whose sum is σ = 91151424. Its totient is φ = 27044064.

The previous prime is 51271819. The next prime is 51271859. The reversal of 51271857 is 75817215.

It is not a de Polignac number, because 51271857 - 2⁷ = 51271729 is a prime.

It is a super-3 number, since 3×51271857³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51271859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30483 + ... + 32120.

It is an arithmetic number, because the mean of its divisors is an integer number (3797976).

Almost surely, 2^51271857 is an apocalyptic number.

It is an amenable number.

51271857 is a deficient number, since it is larger than the sum of its proper divisors (39879567).

51271857 is a wasteful number, since it uses less digits than its factorization.

51271857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62629 (or 62626 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 51271857 is about 7160.4369280094. The cubic root of 51271857 is about 371.5007393653.

The spelling of 51271857 in words is "fifty-one million, two hundred seventy-one thousand, eight hundred fifty-seven".