56305522121 has 4 divisors (see below), whose sum is σ = 57614952912. Its totient is φ = 54996091332.

The previous prime is 56305522103. The next prime is 56305522171. The reversal of 56305522121 is 12122550365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56305522121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56305522171) 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, 654715331 + ... + 654715416.

It is an arithmetic number, because the mean of its divisors is an integer number (14403738228).

Almost surely, 2^56305522121 is an apocalyptic number.

It is an amenable number.

56305522121 is a deficient number, since it is larger than the sum of its proper divisors (1309430791).

56305522121 is a wasteful number, since it uses less digits than its factorization.

56305522121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309430790.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 56305522121 in words is "fifty-six billion, three hundred five million, five hundred twenty-two thousand, one hundred twenty-one".