55505201 has 4 divisors (see below), whose sum is σ = 55520112. Its totient is φ = 55490292.

The previous prime is 55505189. The next prime is 55505207. The reversal of 55505201 is 10250555.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55505201 - 2¹⁴ = 55488817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55505207) 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, 3326 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (13880028).

Almost surely, 2^55505201 is an apocalyptic number.

It is an amenable number.

55505201 is a deficient number, since it is larger than the sum of its proper divisors (14911).

55505201 is an equidigital number, since it uses as much as digits as its factorization.

55505201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14910.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 55505201 is about 7450.1812729624. The cubic root of 55505201 is about 381.4560961829.

Adding to 55505201 its reverse (10250555), we get a palindrome (65755756).

The spelling of 55505201 in words is "fifty-five million, five hundred five thousand, two hundred one".