55072277 has 4 divisors (see below), whose sum is σ = 59308620. Its totient is φ = 50835936.

The previous prime is 55072201. The next prime is 55072289. The reversal of 55072277 is 77227055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32878756 + 22193521 = 5734^2 + 4711^2 .

It is a cyclic number.

It is not a de Polignac number, because 55072277 - 2¹⁴ = 55055893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55071277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118152 + ... + 2118177.

It is an arithmetic number, because the mean of its divisors is an integer number (14827155).

Almost surely, 2^55072277 is an apocalyptic number.

It is an amenable number.

55072277 is a deficient number, since it is larger than the sum of its proper divisors (4236343).

55072277 is a wasteful number, since it uses less digits than its factorization.

55072277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236342.

The product of its (nonzero) digits is 34300, while the sum is 35.

The square root of 55072277 is about 7421.0698015852. The cubic root of 55072277 is about 380.4617586094.

It can be divided in two parts, 550 and 72277, that added together give a palindrome (72827).

The spelling of 55072277 in words is "fifty-five million, seventy-two thousand, two hundred seventy-seven".