56055122623821 has 4 divisors (see below), whose sum is σ = 74740163498432. Its totient is φ = 37370081749212.

The previous prime is 56055122623807. The next prime is 56055122623861. The reversal of 56055122623821 is 12832622155065.

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 not a de Polignac number, because 56055122623821 - 2¹⁹ = 56055122099533 is a prime.

It is a super-2 number, since 2×56055122623821² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56055122623861) 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, 9342520437301 + ... + 9342520437306.

It is an arithmetic number, because the mean of its divisors is an integer number (18685040874608).

Almost surely, 2^{56055122623821} is an apocalyptic number.

It is an amenable number.

56055122623821 is a deficient number, since it is larger than the sum of its proper divisors (18685040874611).

56055122623821 is a wasteful number, since it uses less digits than its factorization.

56055122623821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18685040874610.

The product of its (nonzero) digits is 1728000, while the sum is 48.

Adding to 56055122623821 its reverse (12832622155065), we get a palindrome (68887744778886).

The spelling of 56055122623821 in words is "fifty-six trillion, fifty-five billion, one hundred twenty-two million, six hundred twenty-three thousand, eight hundred twenty-one".