51239194 has 4 divisors (see below), whose sum is σ = 76858794. Its totient is φ = 25619596.

The previous prime is 51239189. The next prime is 51239203. The reversal of 51239194 is 49193215.

51239194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35343025 + 15896169 = 5945^2 + 3987^2 .

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 as a sum of consecutive naturals, namely, 12809797 + ... + 12809800.

Almost surely, 2^51239194 is an apocalyptic number.

51239194 is a deficient number, since it is larger than the sum of its proper divisors (25619600).

51239194 is a wasteful number, since it uses less digits than its factorization.

51239194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25619599.

The product of its digits is 9720, while the sum is 34.

The square root of 51239194 is about 7158.1557680732. The cubic root of 51239194 is about 371.4218337887.

The spelling of 51239194 in words is "fifty-one million, two hundred thirty-nine thousand, one hundred ninety-four".