51069871 has 12 divisors (see below), whose sum is σ = 53174920. Its totient is φ = 49034160.

The previous prime is 51069857. The next prime is 51069881. The reversal of 51069871 is 17896015.

It is not a de Polignac number, because 51069871 - 2¹¹ = 51067823 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51069871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51069881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134560 + ... + 134938.

Almost surely, 2^51069871 is an apocalyptic number.

51069871 is a deficient number, since it is larger than the sum of its proper divisors (2105049).

51069871 is an equidigital number, since it uses as much as digits as its factorization.

51069871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 51069871 is about 7146.3187026608. The cubic root of 51069871 is about 371.0122536959.

The spelling of 51069871 in words is "fifty-one million, sixty-nine thousand, eight hundred seventy-one".