51247984 has 20 divisors (see below), whose sum is σ = 99511984. Its totient is φ = 25567488.

The previous prime is 51247981. The next prime is 51247993. The reversal of 51247984 is 48974215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51247981) 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, 4504 + ... + 11080.

Almost surely, 2^51247984 is an apocalyptic number.

It is an amenable number.

51247984 is a deficient number, since it is larger than the sum of its proper divisors (48264000).

51247984 is a wasteful number, since it uses less digits than its factorization.

51247984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7072 (or 7066 counting only the distinct ones).

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

The square root of 51247984 is about 7158.7697267058. The cubic root of 51247984 is about 371.4430715106.

The spelling of 51247984 in words is "fifty-one million, two hundred forty-seven thousand, nine hundred eighty-four".