51699020 has 12 divisors (see below), whose sum is σ = 108567984. Its totient is φ = 20679600.

The previous prime is 51699017. The next prime is 51699031. The reversal of 51699020 is 2099615.

51699020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 in 3 ways as a sum of consecutive naturals, for example, 1292456 + ... + 1292495.

It is an arithmetic number, because the mean of its divisors is an integer number (9047332).

Almost surely, 2^51699020 is an apocalyptic number.

It is an amenable number.

51699020 is an abundant number, since it is smaller than the sum of its proper divisors (56868964).

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

51699020 is a wasteful number, since it uses less digits than its factorization.

51699020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584960 (or 2584958 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 51699020 is about 7190.2030569380. The cubic root of 51699020 is about 372.5295864073.

The spelling of 51699020 in words is "fifty-one million, six hundred ninety-nine thousand, twenty".