51229664 has 24 divisors (see below), whose sum is σ = 103321008. Its totient is φ = 24989440.

The previous prime is 51229663. The next prime is 51229669. The reversal of 51229664 is 46692215.

It is a happy number.

51229664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51229663) 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 3 ways as a sum of consecutive naturals, for example, 18212 + ... + 20835.

It is an arithmetic number, because the mean of its divisors is an integer number (4305042).

Almost surely, 2^51229664 is an apocalyptic number.

It is an amenable number.

51229664 is an abundant number, since it is smaller than the sum of its proper divisors (52091344).

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

51229664 is a wasteful number, since it uses less digits than its factorization.

51229664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39098 (or 39090 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 51229664 is about 7157.4900628642. The cubic root of 51229664 is about 371.3988053915.

The spelling of 51229664 in words is "fifty-one million, two hundred twenty-nine thousand, six hundred sixty-four".