51181500587 has 16 divisors (see below), whose sum is σ = 58663388160. Its totient is φ = 43742323968.

The previous prime is 51181500581. The next prime is 51181500641. The reversal of 51181500587 is 78500518115.

It is not a de Polignac number, because 51181500587 - 2²² = 51177306283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51181500581) 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, 4855739 + ... + 4866267.

It is an arithmetic number, because the mean of its divisors is an integer number (3666461760).

Almost surely, 2^51181500587 is an apocalyptic number.

51181500587 is a deficient number, since it is larger than the sum of its proper divisors (7481887573).

51181500587 is a wasteful number, since it uses less digits than its factorization.

51181500587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12490.

The product of its (nonzero) digits is 56000, while the sum is 41.

The spelling of 51181500587 in words is "fifty-one billion, one hundred eighty-one million, five hundred thousand, five hundred eighty-seven".