55376221 has 2 divisors, whose sum is σ = 55376222. Its totient is φ = 55376220.

The previous prime is 55376207. The next prime is 55376287. The reversal of 55376221 is 12267355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 10150596 = 6725^2 + 3186^2 .

It is a cyclic number.

It is not a de Polignac number, because 55376221 - 2¹¹ = 55374173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55376201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27688110 + 27688111.

It is an arithmetic number, because the mean of its divisors is an integer number (27688111).

Almost surely, 2^55376221 is an apocalyptic number.

It is an amenable number.

55376221 is a deficient number, since it is larger than the sum of its proper divisors (1).

55376221 is an equidigital number, since it uses as much as digits as its factorization.

55376221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 55376221 is about 7441.5200732108. The cubic root of 55376221 is about 381.1603979704.

The spelling of 55376221 in words is "fifty-five million, three hundred seventy-six thousand, two hundred twenty-one".