51502216 has 8 divisors (see below), whose sum is σ = 96566670. Its totient is φ = 25751104.

The previous prime is 51502207. The next prime is 51502249. The reversal of 51502216 is 61220515.

It can be written as a sum of positive squares in only one way, i.e., 31877316 + 19624900 = 5646^2 + 4430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 3218881 + ... + 3218896.

Almost surely, 2^51502216 is an apocalyptic number.

It is an amenable number.

51502216 is a deficient number, since it is larger than the sum of its proper divisors (45064454).

51502216 is a wasteful number, since it uses less digits than its factorization.

51502216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437783 (or 6437779 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 51502216 is about 7176.5044415788. The cubic root of 51502216 is about 372.0562793026.

The spelling of 51502216 in words is "fifty-one million, five hundred two thousand, two hundred sixteen".