51207200845 has 8 divisors (see below), whose sum is σ = 65063267064. Its totient is φ = 38556009984.

The previous prime is 51207200843. The next prime is 51207200951. The reversal of 51207200845 is 54800270215.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17145545481 + 34061655364 = 130941^2 + 184558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51207200845 - 2¹ = 51207200843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51207200845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51207200843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301218744 + ... + 301218913.

It is an arithmetic number, because the mean of its divisors is an integer number (8132908383).

Almost surely, 2^51207200845 is an apocalyptic number.

It is an amenable number.

51207200845 is a deficient number, since it is larger than the sum of its proper divisors (13856066219).

51207200845 is a wasteful number, since it uses less digits than its factorization.

51207200845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602437679.

The product of its (nonzero) digits is 22400, while the sum is 34.

The spelling of 51207200845 in words is "fifty-one billion, two hundred seven million, two hundred thousand, eight hundred forty-five".