51156194 has 8 divisors (see below), whose sum is σ = 77132460. Its totient is φ = 25445376.

The previous prime is 51156181. The next prime is 51156241. The reversal of 51156194 is 49165115.

It can be written as a sum of positive squares in 2 ways, for example, as 49182169 + 1974025 = 7013^2 + 1405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51156194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65879 + ... + 66650.

Almost surely, 2^51156194 is an apocalyptic number.

51156194 is a deficient number, since it is larger than the sum of its proper divisors (25976266).

51156194 is a wasteful number, since it uses less digits than its factorization.

51156194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132724.

The product of its digits is 5400, while the sum is 32.

The square root of 51156194 is about 7152.3558356670. The cubic root of 51156194 is about 371.2211757220.

The spelling of 51156194 in words is "fifty-one million, one hundred fifty-six thousand, one hundred ninety-four".