51502689 has 32 divisors (see below), whose sum is σ = 87552000. Its totient is φ = 29311632.

The previous prime is 51502667. The next prime is 51502709. The reversal of 51502689 is 98620515.

It is a happy number.

51502689 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 51502689 - 2¹³ = 51494497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51502189) by changing a digit.

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, 71272 + ... + 71990.

It is an arithmetic number, because the mean of its divisors is an integer number (2736000).

Almost surely, 2^51502689 is an apocalyptic number.

It is an amenable number.

51502689 is a deficient number, since it is larger than the sum of its proper divisors (36049311).

51502689 is a wasteful number, since it uses less digits than its factorization.

51502689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 51502689 is about 7176.5373962657. The cubic root of 51502689 is about 372.0574182962.

The spelling of 51502689 in words is "fifty-one million, five hundred two thousand, six hundred eighty-nine".