55535522217 has 16 divisors (see below), whose sum is σ = 86012863872. Its totient is φ = 31214344320.

The previous prime is 55535522201. The next prime is 55535522227. The reversal of 55535522217 is 71222553555.

It is not a de Polignac number, because 55535522217 - 2⁴ = 55535522201 is a prime.

It is a super-3 number, since 3×55535522217³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55535522227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21675348 + ... + 21677909.

It is an arithmetic number, because the mean of its divisors is an integer number (5375803992).

Almost surely, 2^55535522217 is an apocalyptic number.

It is an amenable number.

55535522217 is a deficient number, since it is larger than the sum of its proper divisors (30477341655).

55535522217 is a wasteful number, since it uses less digits than its factorization.

55535522217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43353328.

The product of its digits is 525000, while the sum is 42.

The spelling of 55535522217 in words is "fifty-five billion, five hundred thirty-five million, five hundred twenty-two thousand, two hundred seventeen".