55221357311 has 2 divisors, whose sum is σ = 55221357312. Its totient is φ = 55221357310.

The previous prime is 55221357241. The next prime is 55221357319. The reversal of 55221357311 is 11375312255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55221357311 is a prime.

It is a super-3 number, since 3×55221357311³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55221357319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27610678655 + 27610678656.

It is an arithmetic number, because the mean of its divisors is an integer number (27610678656).

Almost surely, 2^55221357311 is an apocalyptic number.

55221357311 is a deficient number, since it is larger than the sum of its proper divisors (1).

55221357311 is an equidigital number, since it uses as much as digits as its factorization.

55221357311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 35.

Adding to 55221357311 its reverse (11375312255), we get a palindrome (66596669566).

The spelling of 55221357311 in words is "fifty-five billion, two hundred twenty-one million, three hundred fifty-seven thousand, three hundred eleven".