51684506 has 4 divisors (see below), whose sum is σ = 77526762. Its totient is φ = 25842252.

The previous prime is 51684461. The next prime is 51684527. The reversal of 51684506 is 60548615.

It is a happy number.

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., 28249225 + 23435281 = 5315^2 + 4841^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12921125 + ... + 12921128.

Almost surely, 2^51684506 is an apocalyptic number.

51684506 is a deficient number, since it is larger than the sum of its proper divisors (25842256).

51684506 is a wasteful number, since it uses less digits than its factorization.

51684506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25842255.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 51684506 is about 7189.1936960969. The cubic root of 51684506 is about 372.4947217846.

The spelling of 51684506 in words is "fifty-one million, six hundred eighty-four thousand, five hundred six".