55526321 has 2 divisors, whose sum is σ = 55526322. Its totient is φ = 55526320.

The previous prime is 55526311. The next prime is 55526323. The reversal of 55526321 is 12362555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30924721 + 24601600 = 5561^2 + 4960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55526321 is a prime.

Together with 55526323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55526323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27763160 + 27763161.

It is an arithmetic number, because the mean of its divisors is an integer number (27763161).

Almost surely, 2^55526321 is an apocalyptic number.

It is an amenable number.

55526321 is a deficient number, since it is larger than the sum of its proper divisors (1).

55526321 is an equidigital number, since it uses as much as digits as its factorization.

55526321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 29.

The square root of 55526321 is about 7451.5985533307. The cubic root of 55526321 is about 381.5044720167.

Adding to 55526321 its reverse (12362555), we get a palindrome (67888876).

The spelling of 55526321 in words is "fifty-five million, five hundred twenty-six thousand, three hundred twenty-one".