51698385 has 32 divisors (see below), whose sum is σ = 92292480. Its totient is φ = 27457344.

The previous prime is 51698363. The next prime is 51698393. The reversal of 51698385 is 58389615.

51698385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51698385 - 2⁶ = 51698321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51698385.

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 31 ways as a sum of consecutive naturals, for example, 38902 + ... + 40208.

It is an arithmetic number, because the mean of its divisors is an integer number (2884140).

Almost surely, 2^51698385 is an apocalyptic number.

It is an amenable number.

51698385 is a deficient number, since it is larger than the sum of its proper divisors (40594095).

51698385 is a wasteful number, since it uses less digits than its factorization.

51698385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1608 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 51698385 is about 7190.1588994959. The cubic root of 51698385 is about 372.5280611865.

The spelling of 51698385 in words is "fifty-one million, six hundred ninety-eight thousand, three hundred eighty-five".