51084742 has 4 divisors (see below), whose sum is σ = 76627116. Its totient is φ = 25542370.

The previous prime is 51084727. The next prime is 51084751. The reversal of 51084742 is 24748015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24748015 = 5 ⋅4949603.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771184 + ... + 12771187.

It is an arithmetic number, because the mean of its divisors is an integer number (19156779).

Almost surely, 2^51084742 is an apocalyptic number.

51084742 is a deficient number, since it is larger than the sum of its proper divisors (25542374).

51084742 is a wasteful number, since it uses less digits than its factorization.

51084742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25542373.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 51084742 is about 7147.3590926999. The cubic root of 51084742 is about 371.0482618006.

The spelling of 51084742 in words is "fifty-one million, eighty-four thousand, seven hundred forty-two".