55221275117 has 4 divisors (see below), whose sum is σ = 58469585436. Its totient is φ = 51972964800.

The previous prime is 55221275101. The next prime is 55221275141. The reversal of 55221275117 is 71157212255.

It is a happy number.

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 17579842921 + 37641432196 = 132589^2 + 194014^2 .

It is a cyclic number.

It is not a de Polignac number, because 55221275117 - 2⁴ = 55221275101 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 (55221275147) 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, 1624155134 + ... + 1624155167.

It is an arithmetic number, because the mean of its divisors is an integer number (14617396359).

Almost surely, 2^55221275117 is an apocalyptic number.

It is an amenable number.

55221275117 is a deficient number, since it is larger than the sum of its proper divisors (3248310319).

55221275117 is a wasteful number, since it uses less digits than its factorization.

55221275117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248310318.

The product of its digits is 49000, while the sum is 38.

The spelling of 55221275117 in words is "fifty-five billion, two hundred twenty-one million, two hundred seventy-five thousand, one hundred seventeen".