55521205193 has 4 divisors (see below), whose sum is σ = 57435729540. Its totient is φ = 53606680848.

The previous prime is 55521205163. The next prime is 55521205211. The reversal of 55521205193 is 39150212555.

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 47057757184 + 8463448009 = 216928^2 + 91997^2 .

It is a cyclic number.

It is not a de Polignac number, because 55521205193 - 2¹⁶ = 55521139657 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 (55521205123) 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, 957262130 + ... + 957262187.

It is an arithmetic number, because the mean of its divisors is an integer number (14358932385).

Almost surely, 2^55521205193 is an apocalyptic number.

It is an amenable number.

55521205193 is a deficient number, since it is larger than the sum of its proper divisors (1914524347).

55521205193 is a wasteful number, since it uses less digits than its factorization.

55521205193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914524346.

The product of its (nonzero) digits is 67500, while the sum is 38.

The spelling of 55521205193 in words is "fifty-five billion, five hundred twenty-one million, two hundred five thousand, one hundred ninety-three".