51560610221 has 8 divisors (see below), whose sum is σ = 53232850944. Its totient is φ = 49888931760.

The previous prime is 51560610197. The next prime is 51560610313. The reversal of 51560610221 is 12201606515.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51560610221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51560610121) 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, 49931 + ... + 324983.

It is an arithmetic number, because the mean of its divisors is an integer number (6654106368).

Almost surely, 2^51560610221 is an apocalyptic number.

It is an amenable number.

51560610221 is a deficient number, since it is larger than the sum of its proper divisors (1672240723).

51560610221 is a wasteful number, since it uses less digits than its factorization.

51560610221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281131.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 51560610221 in words is "fifty-one billion, five hundred sixty million, six hundred ten thousand, two hundred twenty-one".