51881335 has 16 divisors (see below), whose sum is σ = 68378112. Its totient is φ = 37476000.

The previous prime is 51881327. The next prime is 51881339. The reversal of 51881335 is 53318815.

It is not a de Polignac number, because 51881335 - 2³ = 51881327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51881335.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51881339) 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, 5182 + ... + 11428.

It is an arithmetic number, because the mean of its divisors is an integer number (4273632).

Almost surely, 2^51881335 is an apocalyptic number.

51881335 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51881335 is a deficient number, since it is larger than the sum of its proper divisors (16496777).

51881335 is a wasteful number, since it uses less digits than its factorization.

51881335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414.

The product of its digits is 14400, while the sum is 34.

The square root of 51881335 is about 7202.8699141384. The cubic root of 51881335 is about 372.9669773610.

The spelling of 51881335 in words is "fifty-one million, eight hundred eighty-one thousand, three hundred thirty-five".