51861116 has 24 divisors (see below), whose sum is σ = 93090816. Its totient is φ = 25268720.

The previous prime is 51861097. The next prime is 51861119. The reversal of 51861116 is 61116815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51861119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58025 + ... + 58911.

It is an arithmetic number, because the mean of its divisors is an integer number (3878784).

Almost surely, 2^51861116 is an apocalyptic number.

It is an amenable number.

51861116 is a deficient number, since it is larger than the sum of its proper divisors (41229700).

51861116 is a wasteful number, since it uses less digits than its factorization.

51861116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1247 counting only the distinct ones).

The product of its digits is 1440, while the sum is 29.

The square root of 51861116 is about 7201.4662395932. The cubic root of 51861116 is about 372.9185206334.

The spelling of 51861116 in words is "fifty-one million, eight hundred sixty-one thousand, one hundred sixteen".