51886791 has 16 divisors (see below), whose sum is σ = 83857920. Its totient is φ = 31446360.

The previous prime is 51886789. The next prime is 51886811. The reversal of 51886791 is 19768815.

It is not a de Polignac number, because 51886791 - 2¹ = 51886789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51886711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87055 + ... + 87648.

It is an arithmetic number, because the mean of its divisors is an integer number (5241120).

Almost surely, 2^51886791 is an apocalyptic number.

51886791 is a deficient number, since it is larger than the sum of its proper divisors (31971129).

51886791 is a wasteful number, since it uses less digits than its factorization.

51886791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174723 (or 174717 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 51886791 is about 7203.2486421059. The cubic root of 51886791 is about 372.9800510191.

The spelling of 51886791 in words is "fifty-one million, eight hundred eighty-six thousand, seven hundred ninety-one".