55333503121 has 4 divisors (see below), whose sum is σ = 59589926452. Its totient is φ = 51077079792.

The previous prime is 55333503091. The next prime is 55333503139. The reversal of 55333503121 is 12130533355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12130533355 = 5 ⋅2426106671.

It can be written as a sum of positive squares in 2 ways, for example, as 6746322496 + 48587180625 = 82136^2 + 220425^2 .

It is a cyclic number.

It is not a de Polignac number, because 55333503121 - 2²⁵ = 55299948689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55333501121) 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, 2128211646 + ... + 2128211671.

It is an arithmetic number, because the mean of its divisors is an integer number (14897481613).

Almost surely, 2^55333503121 is an apocalyptic number.

It is an amenable number.

55333503121 is a deficient number, since it is larger than the sum of its proper divisors (4256423331).

55333503121 is a wasteful number, since it uses less digits than its factorization.

55333503121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256423330.

The product of its (nonzero) digits is 20250, while the sum is 31.

The spelling of 55333503121 in words is "fifty-five billion, three hundred thirty-three million, five hundred three thousand, one hundred twenty-one".