51561015059 has 4 divisors (see below), whose sum is σ = 51786172560. Its totient is φ = 51335857560.

The previous prime is 51561015013. The next prime is 51561015089. The reversal of 51561015059 is 95051016515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51561015059 - 2⁸ = 51561014803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51561015089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112578407 + ... + 112578864.

It is an arithmetic number, because the mean of its divisors is an integer number (12946543140).

Almost surely, 2^51561015059 is an apocalyptic number.

51561015059 is a deficient number, since it is larger than the sum of its proper divisors (225157501).

51561015059 is a wasteful number, since it uses less digits than its factorization.

51561015059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225157500.

The product of its (nonzero) digits is 33750, while the sum is 38.

The spelling of 51561015059 in words is "fifty-one billion, five hundred sixty-one million, fifteen thousand, fifty-nine".