51493766 has 4 divisors (see below), whose sum is σ = 77240652. Its totient is φ = 25746882.

The previous prime is 51493753. The next prime is 51493777. The reversal of 51493766 is 66739415.

51493766 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, and also an emirpimes, since its reverse is a distinct semiprime: 66739415 = 5 ⋅13347883.

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 as a sum of consecutive naturals, namely, 12873440 + ... + 12873443.

It is an arithmetic number, because the mean of its divisors is an integer number (19310163).

Almost surely, 2^51493766 is an apocalyptic number.

51493766 is a deficient number, since it is larger than the sum of its proper divisors (25746886).

51493766 is a wasteful number, since it uses less digits than its factorization.

51493766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25746885.

The product of its digits is 136080, while the sum is 41.

The square root of 51493766 is about 7175.9156906976. The cubic root of 51493766 is about 372.0359303561.

The spelling of 51493766 in words is "fifty-one million, four hundred ninety-three thousand, seven hundred sixty-six".