51690080 has 48 divisors (see below), whose sum is σ = 131516784. Its totient is φ = 19084800.

The previous prime is 51690049. The next prime is 51690097. The reversal of 51690080 is 8009615.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 10346 + ... + 14505.

It is an arithmetic number, because the mean of its divisors is an integer number (2739933).

Almost surely, 2^51690080 is an apocalyptic number.

It is an amenable number.

51690080 is an abundant number, since it is smaller than the sum of its proper divisors (79826704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51690080 is a wasteful number, since it uses less digits than its factorization.

51690080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24879 (or 24871 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 51690080 is about 7189.5813508159. The cubic root of 51690080 is about 372.5081120705.

Adding to 51690080 its reverse (8009615), we get a palindrome (59699695).

The spelling of 51690080 in words is "fifty-one million, six hundred ninety thousand, eighty".