55675221 has 24 divisors (see below), whose sum is σ = 91437120. Its totient is φ = 29941632.

The previous prime is 55675181. The next prime is 55675223. The reversal of 55675221 is 12257655.

It is not a de Polignac number, because 55675221 - 2¹⁹ = 55150933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55675223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8641 + ... + 13638.

It is an arithmetic number, because the mean of its divisors is an integer number (3809880).

Almost surely, 2^55675221 is an apocalyptic number.

55675221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55675221 is a deficient number, since it is larger than the sum of its proper divisors (35761899).

55675221 is a wasteful number, since it uses less digits than its factorization.

55675221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22313 (or 22306 counting only the distinct ones).

The product of its digits is 21000, while the sum is 33.

The square root of 55675221 is about 7461.5830089868. The cubic root of 55675221 is about 381.8451831915.

The spelling of 55675221 in words is "fifty-five million, six hundred seventy-five thousand, two hundred twenty-one".