51216953207 has 24 divisors (see below), whose sum is σ = 59946093792. Its totient is φ = 43630540800.

The previous prime is 51216953191. The next prime is 51216953213. The reversal of 51216953207 is 70235961215.

It is not a de Polignac number, because 51216953207 - 2⁴ = 51216953191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51216953237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5374607 + ... + 5384127.

It is an arithmetic number, because the mean of its divisors is an integer number (2497753908).

Almost surely, 2^51216953207 is an apocalyptic number.

51216953207 is a deficient number, since it is larger than the sum of its proper divisors (8729140585).

51216953207 is a wasteful number, since it uses less digits than its factorization.

51216953207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10199 (or 10192 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 51216953207 in words is "fifty-one billion, two hundred sixteen million, nine hundred fifty-three thousand, two hundred seven".