51684422 has 4 divisors (see below), whose sum is σ = 77526636. Its totient is φ = 25842210.

The previous prime is 51684401. The next prime is 51684433. The reversal of 51684422 is 22448615.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12921104 + ... + 12921107.

It is an arithmetic number, because the mean of its divisors is an integer number (19381659).

Almost surely, 2^51684422 is an apocalyptic number.

51684422 is a deficient number, since it is larger than the sum of its proper divisors (25842214).

51684422 is a wasteful number, since it uses less digits than its factorization.

51684422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25842213.

The product of its digits is 15360, while the sum is 32.

The square root of 51684422 is about 7189.1878539930. The cubic root of 51684422 is about 372.4945199860.

The spelling of 51684422 in words is "fifty-one million, six hundred eighty-four thousand, four hundred twenty-two".