51689032 has 8 divisors (see below), whose sum is σ = 96916950. Its totient is φ = 25844512.

The previous prime is 51689017. The next prime is 51689039. The reversal of 51689032 is 23098615.

It can be written as a sum of positive squares in only one way, i.e., 49084036 + 2604996 = 7006^2 + 1614^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51689039) 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 as a sum of consecutive naturals, namely, 3230557 + ... + 3230572.

Almost surely, 2^51689032 is an apocalyptic number.

It is an amenable number.

51689032 is a deficient number, since it is larger than the sum of its proper divisors (45227918).

51689032 is a wasteful number, since it uses less digits than its factorization.

51689032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6461135 (or 6461131 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 51689032 is about 7189.5084672041. The cubic root of 51689032 is about 372.5055945589.

The spelling of 51689032 in words is "fifty-one million, six hundred eighty-nine thousand, thirty-two".