51863216 has 10 divisors (see below), whose sum is σ = 100485012. Its totient is φ = 25931600.

The previous prime is 51863191. The next prime is 51863249. The reversal of 51863216 is 61236815.

It is a happy number.

It is a zygodrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1620710 + ... + 1620741.

Almost surely, 2^51863216 is an apocalyptic number.

It is an amenable number.

51863216 is a deficient number, since it is larger than the sum of its proper divisors (48621796).

51863216 is a wasteful number, since it uses less digits than its factorization.

51863216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241459 (or 3241453 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 51863216 is about 7201.6120417584. The cubic root of 51863216 is about 372.9235540662.

The spelling of 51863216 in words is "fifty-one million, eight hundred sixty-three thousand, two hundred sixteen".