51157738 has 8 divisors (see below), whose sum is σ = 77134788. Its totient is φ = 25446144.

The previous prime is 51157697. The next prime is 51157739. The reversal of 51157738 is 83775115.

51157738 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 50794129 + 363609 = 7127^2 + 603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51157738² = 5234228314553288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51157697 and 51157706.

It is not an unprimeable number, because it can be changed into a prime (51157739) 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, 65881 + ... + 66652.

Almost surely, 2^51157738 is an apocalyptic number.

51157738 is a deficient number, since it is larger than the sum of its proper divisors (25977050).

51157738 is a wasteful number, since it uses less digits than its factorization.

51157738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132728.

The product of its digits is 29400, while the sum is 37.

The square root of 51157738 is about 7152.4637713168. The cubic root of 51157738 is about 371.2249104260.

The spelling of 51157738 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred thirty-eight".