51681950 has 24 divisors (see below), whose sum is σ = 96321960. Its totient is φ = 20631200.

The previous prime is 51681947. The next prime is 51681961. The reversal of 51681950 is 5918615.

51681950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (35) 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 51681950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40421 + ... + 41679.

It is an arithmetic number, because the mean of its divisors is an integer number (4013415).

Almost surely, 2^51681950 is an apocalyptic number.

51681950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51681950 is a deficient number, since it is larger than the sum of its proper divisors (44640010).

51681950 is a wasteful number, since it uses less digits than its factorization.

51681950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 51681950 is about 7189.0159270932. The cubic root of 51681950 is about 372.4885812454.

The spelling of 51681950 in words is "fifty-one million, six hundred eighty-one thousand, nine hundred fifty".