55029217 has 4 divisors (see below), whose sum is σ = 55257796. Its totient is φ = 54800640.

The previous prime is 55029203. The next prime is 55029251. The reversal of 55029217 is 71292055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71292055 = 5 ⋅14258411.

It can be written as a sum of positive squares in 2 ways, for example, as 34562641 + 20466576 = 5879^2 + 4524^2 .

It is a cyclic number.

It is not a de Polignac number, because 55029217 - 2¹¹ = 55027169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55029277) 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, 113928 + ... + 114409.

It is an arithmetic number, because the mean of its divisors is an integer number (13814449).

Almost surely, 2^55029217 is an apocalyptic number.

It is an amenable number.

55029217 is a deficient number, since it is larger than the sum of its proper divisors (228579).

55029217 is a wasteful number, since it uses less digits than its factorization.

55029217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228578.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 55029217 is about 7418.1680353036. The cubic root of 55029217 is about 380.3625740720.

The spelling of 55029217 in words is "fifty-five million, twenty-nine thousand, two hundred seventeen".