55525217 has 4 divisors (see below), whose sum is σ = 60572976. Its totient is φ = 50477460.

The previous prime is 55525207. The next prime is 55525241. The reversal of 55525217 is 71252555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55525217 - 2¹⁶ = 55459681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55525207) 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, 2523863 + ... + 2523884.

It is an arithmetic number, because the mean of its divisors is an integer number (15143244).

Almost surely, 2^55525217 is an apocalyptic number.

It is an amenable number.

55525217 is a deficient number, since it is larger than the sum of its proper divisors (5047759).

55525217 is a wasteful number, since it uses less digits than its factorization.

55525217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047758.

The product of its digits is 17500, while the sum is 32.

The square root of 55525217 is about 7451.5244748977. The cubic root of 55525217 is about 381.5019435838.

The spelling of 55525217 in words is "fifty-five million, five hundred twenty-five thousand, two hundred seventeen".