56021617213 has 4 divisors (see below), whose sum is σ = 56023968060. Its totient is φ = 56019266368.

The previous prime is 56021617193. The next prime is 56021617229. The reversal of 56021617213 is 31271612065.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31271612065 = 5 ⋅6254322413.

It can be written as a sum of positive squares in 2 ways, for example, as 49523161444 + 6498455769 = 222538^2 + 80613^2 .

It is a cyclic number.

It is not a de Polignac number, because 56021617213 - 2¹⁷ = 56021486141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56021617313) 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, 1139308 + ... + 1187461.

It is an arithmetic number, because the mean of its divisors is an integer number (14005992015).

Almost surely, 2^56021617213 is an apocalyptic number.

It is an amenable number.

56021617213 is a deficient number, since it is larger than the sum of its proper divisors (2350847).

56021617213 is a wasteful number, since it uses less digits than its factorization.

56021617213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350846.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 56021617213 in words is "fifty-six billion, twenty-one million, six hundred seventeen thousand, two hundred thirteen".