51157746 has 12 divisors (see below), whose sum is σ = 110841822. Its totient is φ = 17052576.

The previous prime is 51157739. The next prime is 51157751. The reversal of 51157746 is 64775115.

51157746 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 only one way, i.e., 27973521 + 23184225 = 5289^2 + 4815^2 .

It is a super-2 number, since 2×51157746² = 5234229951601032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51157746.

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 5 ways as a sum of consecutive naturals, for example, 1421031 + ... + 1421066.

Almost surely, 2^51157746 is an apocalyptic number.

51157746 is an abundant number, since it is smaller than the sum of its proper divisors (59684076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51157746 is a wasteful number, since it uses less digits than its factorization.

51157746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842105 (or 2842102 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 51157746 is about 7152.4643305647. The cubic root of 51157746 is about 371.2249297766.

The spelling of 51157746 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred forty-six".