51423648 has 24 divisors (see below), whose sum is σ = 134987328. Its totient is φ = 17141184.

The previous prime is 51423643. The next prime is 51423649. The reversal of 51423648 is 84632415.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51423643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267736 + ... + 267927.

It is an arithmetic number, because the mean of its divisors is an integer number (5624472).

Almost surely, 2^51423648 is an apocalyptic number.

It is an amenable number.

51423648 is an abundant number, since it is smaller than the sum of its proper divisors (83563680).

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

51423648 is a wasteful number, since it uses less digits than its factorization.

51423648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535676 (or 535668 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 51423648 is about 7171.0283781338. The cubic root of 51423648 is about 371.8669890984.

The spelling of 51423648 in words is "fifty-one million, four hundred twenty-three thousand, six hundred forty-eight".