55535321 has 2 divisors, whose sum is σ = 55535322. Its totient is φ = 55535320.

The previous prime is 55535303. The next prime is 55535329. The reversal of 55535321 is 12353555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27825625 + 27709696 = 5275^2 + 5264^2 .

It is a cyclic number.

It is not a de Polignac number, because 55535321 - 2⁶ = 55535257 is a prime.

It is not a weakly prime, because it can be changed into another prime (55535329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27767660 + 27767661.

It is an arithmetic number, because the mean of its divisors is an integer number (27767661).

Almost surely, 2^55535321 is an apocalyptic number.

It is an amenable number.

55535321 is a deficient number, since it is larger than the sum of its proper divisors (1).

55535321 is an equidigital number, since it uses as much as digits as its factorization.

55535321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 29.

The square root of 55535321 is about 7452.2024261288. The cubic root of 55535321 is about 381.5250829912.

Adding to 55535321 its reverse (12353555), we get a palindrome (67888876).

The spelling of 55535321 in words is "fifty-five million, five hundred thirty-five thousand, three hundred twenty-one".