55505370217 has 16 divisors (see below), whose sum is σ = 62975059200. Its totient is φ = 48474167040.

The previous prime is 55505370211. The next prime is 55505370223. The reversal of 55505370217 is 71207350555.

55505370217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55505370211) and next prime (55505370223).

It is a cyclic number.

It is not a de Polignac number, because 55505370217 - 2¹⁵ = 55505337449 is a prime.

It is a super-2 number, since 2×55505370217² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55505370217.

It is not an unprimeable number, because it can be changed into a prime (55505370211) 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, 830992 + ... + 895297.

It is an arithmetic number, because the mean of its divisors is an integer number (3935941200).

Almost surely, 2^55505370217 is an apocalyptic number.

It is an amenable number.

55505370217 is a deficient number, since it is larger than the sum of its proper divisors (7469688983).

55505370217 is a wasteful number, since it uses less digits than its factorization.

55505370217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726416.

The product of its (nonzero) digits is 183750, while the sum is 40.

The spelling of 55505370217 in words is "fifty-five billion, five hundred five million, three hundred seventy thousand, two hundred seventeen".