51861850 has 24 divisors (see below), whose sum is σ = 97056288. Its totient is φ = 20617200.

The previous prime is 51861833. The next prime is 51861851. The reversal of 51861850 is 5816815.

It is not an unprimeable number, because it can be changed into a prime (51861851) 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, 5245 + ... + 11455.

It is an arithmetic number, because the mean of its divisors is an integer number (4044012).

Almost surely, 2^51861850 is an apocalyptic number.

51861850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51861850 is a deficient number, since it is larger than the sum of its proper divisors (45194438).

51861850 is a wasteful number, since it uses less digits than its factorization.

51861850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 51861850 is about 7201.5172012570. The cubic root of 51861850 is about 372.9202799535.

The spelling of 51861850 in words is "fifty-one million, eight hundred sixty-one thousand, eight hundred fifty".