51154739 has 4 divisors (see below), whose sum is σ = 51171360. Its totient is φ = 51138120.

The previous prime is 51154721. The next prime is 51154759. The reversal of 51154739 is 93745115.

51154739 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 is a cyclic number.

It is not a de Polignac number, because 51154739 - 2⁸ = 51154483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51154699 and 51154708.

It is not an unprimeable number, because it can be changed into a prime (51154709) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2192 + ... + 10349.

It is an arithmetic number, because the mean of its divisors is an integer number (12792840).

Almost surely, 2^51154739 is an apocalyptic number.

51154739 is a deficient number, since it is larger than the sum of its proper divisors (16621).

51154739 is a wasteful number, since it uses less digits than its factorization.

51154739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16620.

The product of its digits is 18900, while the sum is 35.

The square root of 51154739 is about 7152.2541202057. The cubic root of 51154739 is about 371.2176562269.

The spelling of 51154739 in words is "fifty-one million, one hundred fifty-four thousand, seven hundred thirty-nine".