54505223021 has 4 divisors (see below), whose sum is σ = 56384713500. Its totient is φ = 52625732544.

The previous prime is 54505223011. The next prime is 54505223041. The reversal of 54505223021 is 12032250545.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17798494921 + 36706728100 = 133411^2 + 191590^2 .

It is a cyclic number.

It is not a de Polignac number, because 54505223021 - 2²² = 54501028717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1879490449 = 54505223021 / (5 + 4 + 5 + 0 + 5 + 2 + 2 + 3 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54505223011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939745196 + ... + 939745253.

It is an arithmetic number, because the mean of its divisors is an integer number (14096178375).

Almost surely, 2^54505223021 is an apocalyptic number.

It is an amenable number.

54505223021 is a deficient number, since it is larger than the sum of its proper divisors (1879490479).

54505223021 is a wasteful number, since it uses less digits than its factorization.

54505223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879490478.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 54505223021 its reverse (12032250545), we get a palindrome (66537473566).

The spelling of 54505223021 in words is "fifty-four billion, five hundred five million, two hundred twenty-three thousand, twenty-one".