51688372 has 24 divisors (see below), whose sum is σ = 93082752. Its totient is φ = 25099200.

The previous prime is 51688369. The next prime is 51688393. The reversal of 51688372 is 27388615.

51688372 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 an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43863 + ... + 45025.

It is an arithmetic number, because the mean of its divisors is an integer number (3878448).

Almost surely, 2^51688372 is an apocalyptic number.

It is an amenable number.

51688372 is a deficient number, since it is larger than the sum of its proper divisors (41394380).

51688372 is a wasteful number, since it uses less digits than its factorization.

51688372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1477 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 51688372 is about 7189.4625668404. The cubic root of 51688372 is about 372.5040090856.

It can be divided in two parts, 516 and 88372, that added together give a palindrome (88888).

The spelling of 51688372 in words is "fifty-one million, six hundred eighty-eight thousand, three hundred seventy-two".