55615217111 has 16 divisors (see below), whose sum is σ = 56180511360. Its totient is φ = 55053803520.

The previous prime is 55615217101. The next prime is 55615217117. The reversal of 55615217111 is 11171251655.

It is a cyclic number.

It is not a de Polignac number, because 55615217111 - 2²² = 55611022807 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 (55615217117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37400210 + ... + 37401696.

It is an arithmetic number, because the mean of its divisors is an integer number (3511281960).

Almost surely, 2^55615217111 is an apocalyptic number.

55615217111 is a deficient number, since it is larger than the sum of its proper divisors (565294249).

55615217111 is a wasteful number, since it uses less digits than its factorization.

55615217111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554.

The product of its digits is 10500, while the sum is 35.

Adding to 55615217111 its reverse (11171251655), we get a palindrome (66786468766).

The spelling of 55615217111 in words is "fifty-five billion, six hundred fifteen million, two hundred seventeen thousand, one hundred eleven".