55771201 has 4 divisors (see below), whose sum is σ = 57570304. Its totient is φ = 53972100.

The previous prime is 55771189. The next prime is 55771223. The reversal of 55771201 is 10217755.

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 a cyclic number.

It is not a de Polignac number, because 55771201 - 2⁷ = 55771073 is a prime.

It is a super-2 number, since 2×55771201² = 6220853721964802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55771201.

It is not an unprimeable number, because it can be changed into a prime (55771241) 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, 899505 + ... + 899566.

It is an arithmetic number, because the mean of its divisors is an integer number (14392576).

Almost surely, 2^55771201 is an apocalyptic number.

It is an amenable number.

55771201 is a deficient number, since it is larger than the sum of its proper divisors (1799103).

55771201 is a wasteful number, since it uses less digits than its factorization.

55771201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799102.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 55771201 is about 7468.0118505530. The cubic root of 55771201 is about 382.0644815904.

Adding to 55771201 its reverse (10217755), we get a palindrome (65988956).

The spelling of 55771201 in words is "fifty-five million, seven hundred seventy-one thousand, two hundred one".