55135750217 has 8 divisors (see below), whose sum is σ = 55774358472. Its totient is φ = 54498960000.

The previous prime is 55135750171. The next prime is 55135750247. The reversal of 55135750217 is 71205753155.

It can be written as a sum of positive squares in 4 ways, for example, as 20973990976 + 34161759241 = 144824^2 + 184829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55135750217 - 2¹² = 55135746121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55135750247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393458 + ... + 514859.

It is an arithmetic number, because the mean of its divisors is an integer number (6971794809).

Almost surely, 2^55135750217 is an apocalyptic number.

It is an amenable number.

55135750217 is a deficient number, since it is larger than the sum of its proper divisors (638608255).

55135750217 is a wasteful number, since it uses less digits than its factorization.

55135750217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909019.

The product of its (nonzero) digits is 183750, while the sum is 41.

The spelling of 55135750217 in words is "fifty-five billion, one hundred thirty-five million, seven hundred fifty thousand, two hundred seventeen".