51775474 has 4 divisors (see below), whose sum is σ = 77663214. Its totient is φ = 25887736.

The previous prime is 51775463. The next prime is 51775501. The reversal of 51775474 is 47457715.

It is a happy number.

51775474 is nontrivially palindromic in base 13.

51775474 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, and also an emirpimes, since its reverse is a distinct semiprime: 47457715 = 5 ⋅9491543.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 294849 = 7175^2 + 543^2 .

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 as a sum of consecutive naturals, namely, 12943867 + ... + 12943870.

Almost surely, 2^51775474 is an apocalyptic number.

51775474 is a deficient number, since it is larger than the sum of its proper divisors (25887740).

51775474 is a wasteful number, since it uses less digits than its factorization.

51775474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25887739.

The product of its digits is 137200, while the sum is 40.

The square root of 51775474 is about 7195.5176325265. The cubic root of 51775474 is about 372.7131317873.

The spelling of 51775474 in words is "fifty-one million, seven hundred seventy-five thousand, four hundred seventy-four".