51366994 has 40 divisors (see below), whose sum is σ = 94785840. Its totient is φ = 20818728.

The previous prime is 51366977. The next prime is 51367003. The reversal of 51366994 is 49966315.

51366994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51366994.

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 19 ways as a sum of consecutive naturals, for example, 90957 + ... + 91519.

It is an arithmetic number, because the mean of its divisors is an integer number (2369646).

Almost surely, 2^51366994 is an apocalyptic number.

51366994 is a deficient number, since it is larger than the sum of its proper divisors (43418846).

51366994 is an equidigital number, since it uses as much as digits as its factorization.

51366994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 591 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 51366994 is about 7167.0770890231. The cubic root of 51366994 is about 371.7303755959.

The spelling of 51366994 in words is "fifty-one million, three hundred sixty-six thousand, nine hundred ninety-four".