51157748 has 12 divisors (see below), whose sum is σ = 89981892. Its totient is φ = 25448640.

The previous prime is 51157739. The next prime is 51157751. The reversal of 51157748 is 84775115.

It is a happy number.

51157748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26337424 + 24820324 = 5132^2 + 4982^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 31673 + ... + 33248.

It is an arithmetic number, because the mean of its divisors is an integer number (7498491).

Almost surely, 2^51157748 is an apocalyptic number.

It is an amenable number.

51157748 is a deficient number, since it is larger than the sum of its proper divisors (38824144).

51157748 is a wasteful number, since it uses less digits than its factorization.

51157748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65122 (or 65120 counting only the distinct ones).

The product of its digits is 39200, while the sum is 38.

The square root of 51157748 is about 7152.4644703766. The cubic root of 51157748 is about 371.2249346143.

The spelling of 51157748 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred forty-eight".