51840190 has 16 divisors (see below), whose sum is σ = 93836880. Its totient is φ = 20619520.

The previous prime is 51840181. The next prime is 51840203. The reversal of 51840190 is 9104815.

It is a happy number.

51840190 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51840190² = 5374810598472200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 12691 + ... + 16270.

It is an arithmetic number, because the mean of its divisors is an integer number (5864805).

Almost surely, 2^51840190 is an apocalyptic number.

51840190 is a deficient number, since it is larger than the sum of its proper divisors (41996690).

51840190 is a wasteful number, since it uses less digits than its factorization.

51840190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29147.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51840190 is about 7200.0131944324. The cubic root of 51840190 is about 372.8683562495.

The spelling of 51840190 in words is "fifty-one million, eight hundred forty thousand, one hundred ninety".