51911872 has 14 divisors (see below), whose sum is σ = 103012748. Its totient is φ = 25955904.

The previous prime is 51911807. The next prime is 51911891. The reversal of 51911872 is 27811915.

It is a happy number.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405498 + ... + 405625.

Almost surely, 2^51911872 is an apocalyptic number.

It is an amenable number.

51911872 is a deficient number, since it is larger than the sum of its proper divisors (51100876).

51911872 is an equidigital number, since it uses as much as digits as its factorization.

51911872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811135 (or 811125 counting only the distinct ones).

The product of its digits is 5040, while the sum is 34.

The square root of 51911872 is about 7204.9893823655. The cubic root of 51911872 is about 373.0401382821.

The spelling of 51911872 in words is "fifty-one million, nine hundred eleven thousand, eight hundred seventy-two".