51653872 has 20 divisors (see below), whose sum is σ = 103531320. Its totient is φ = 24936128.

The previous prime is 51653867. The next prime is 51653873. The reversal of 51653872 is 27835615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51653873) 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 in 3 ways as a sum of consecutive naturals, for example, 55198 + ... + 56125.

It is an arithmetic number, because the mean of its divisors is an integer number (5176566).

Almost surely, 2^51653872 is an apocalyptic number.

It is an amenable number.

51653872 is an abundant number, since it is smaller than the sum of its proper divisors (51877448).

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

51653872 is a wasteful number, since it uses less digits than its factorization.

51653872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111360 (or 111354 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 51653872 is about 7187.0628214870. The cubic root of 51653872 is about 372.4211132740.

It can be divided in two parts, 51653 and 872, that added together give a palindrome (52525).

The spelling of 51653872 in words is "fifty-one million, six hundred fifty-three thousand, eight hundred seventy-two".