51201112087 has 16 divisors (see below), whose sum is σ = 55646438400. Its totient is φ = 46931512320.

The previous prime is 51201112021. The next prime is 51201112099. The reversal of 51201112087 is 78021110215.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51201112087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201112007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5189463 + ... + 5199319.

It is an arithmetic number, because the mean of its divisors is an integer number (3477902400).

Almost surely, 2^51201112087 is an apocalyptic number.

51201112087 is a deficient number, since it is larger than the sum of its proper divisors (4445326313).

51201112087 is a wasteful number, since it uses less digits than its factorization.

51201112087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18726.

The product of its (nonzero) digits is 1120, while the sum is 28.

The spelling of 51201112087 in words is "fifty-one billion, two hundred one million, one hundred twelve thousand, eighty-seven".