55312201 has 4 divisors (see below), whose sum is σ = 63213952. Its totient is φ = 47410452.

The previous prime is 55312189. The next prime is 55312267. The reversal of 55312201 is 10221355.

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 an emirpimes, since its reverse is a distinct semiprime: 10221355 = 5 ⋅2044271.

It is a cyclic number.

It is not a de Polignac number, because 55312201 - 2⁷ = 55312073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55312291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3950865 + ... + 3950878.

It is an arithmetic number, because the mean of its divisors is an integer number (15803488).

Almost surely, 2^55312201 is an apocalyptic number.

It is an amenable number.

55312201 is a deficient number, since it is larger than the sum of its proper divisors (7901751).

55312201 is an equidigital number, since it uses as much as digits as its factorization.

55312201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7901750.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55312201 is about 7437.2172887445. The cubic root of 55312201 is about 381.0134558480.

Adding to 55312201 its reverse (10221355), we get a palindrome (65533556).

The spelling of 55312201 in words is "fifty-five million, three hundred twelve thousand, two hundred one".