51684122 has 24 divisors (see below), whose sum is σ = 91130004. Its totient is φ = 21917952.

The previous prime is 51684121. The next prime is 51684167. The reversal of 51684122 is 22148615.

It can be written as a sum of positive squares in 2 ways, for example, as 51681721 + 2401 = 7189^2 + 49^2 .

It is not an unprimeable number, because it can be changed into a prime (51684121) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 6788 + ... + 12224.

Almost surely, 2^51684122 is an apocalyptic number.

51684122 is a deficient number, since it is larger than the sum of its proper divisors (39445882).

51684122 is a wasteful number, since it uses less digits than its factorization.

51684122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550 (or 5543 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 51684122 is about 7189.1669892972. The cubic root of 51684122 is about 372.4937992752.

The spelling of 51684122 in words is "fifty-one million, six hundred eighty-four thousand, one hundred twenty-two".