51517946 has 4 divisors (see below), whose sum is σ = 77276922. Its totient is φ = 25758972.

The previous prime is 51517927. The next prime is 51517951. The reversal of 51517946 is 64971515.

51517946 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 can be written as a sum of positive squares in only one way, i.e., 40462321 + 11055625 = 6361^2 + 3325^2 .

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, 12879485 + ... + 12879488.

Almost surely, 2^51517946 is an apocalyptic number.

51517946 is a deficient number, since it is larger than the sum of its proper divisors (25758976).

51517946 is a wasteful number, since it uses less digits than its factorization.

51517946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25758975.

The product of its digits is 37800, while the sum is 38.

The square root of 51517946 is about 7177.6002953633. The cubic root of 51517946 is about 372.0941537218.

The spelling of 51517946 in words is "fifty-one million, five hundred seventeen thousand, nine hundred forty-six".