55227521 has 2 divisors, whose sum is σ = 55227522. Its totient is φ = 55227520.

The previous prime is 55227503. The next prime is 55227539. The reversal of 55227521 is 12572255.

It is a balanced prime because it is at equal distance from previous prime (55227503) and next prime (55227539).

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 25361296 = 5465^2 + 5036^2 .

It is a cyclic number.

It is not a de Polignac number, because 55227521 - 2⁶ = 55227457 is a prime.

It is not a weakly prime, because it can be changed into another prime (55227541) 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 as a sum of consecutive naturals, namely, 27613760 + 27613761.

It is an arithmetic number, because the mean of its divisors is an integer number (27613761).

Almost surely, 2^55227521 is an apocalyptic number.

It is an amenable number.

55227521 is a deficient number, since it is larger than the sum of its proper divisors (1).

55227521 is an equidigital number, since it uses as much as digits as its factorization.

55227521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 29.

The square root of 55227521 is about 7431.5221186511. The cubic root of 55227521 is about 380.8189195142.

Adding to 55227521 its reverse (12572255), we get a palindrome (67799776).

The spelling of 55227521 in words is "fifty-five million, two hundred twenty-seven thousand, five hundred twenty-one".