51271216 has 10 divisors (see below), whose sum is σ = 99338012. Its totient is φ = 25635600.

The previous prime is 51271211. The next prime is 51271223. The reversal of 51271216 is 61217215.

It is not an unprimeable number, because it can be changed into a prime (51271211) 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 as a sum of consecutive naturals, namely, 1602210 + ... + 1602241.

Almost surely, 2^51271216 is an apocalyptic number.

It is an amenable number.

51271216 is a deficient number, since it is larger than the sum of its proper divisors (48066796).

51271216 is a wasteful number, since it uses less digits than its factorization.

51271216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204459 (or 3204453 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 51271216 is about 7160.3921680310. The cubic root of 51271216 is about 371.4991911932.

The spelling of 51271216 in words is "fifty-one million, two hundred seventy-one thousand, two hundred sixteen".