223021311551 has 2 divisors, whose sum is σ = 223021311552. Its totient is φ = 223021311550.

The previous prime is 223021311521. The next prime is 223021311559. The reversal of 223021311551 is 155113120322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 223021311551 - 2¹⁰ = 223021310527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223021311551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223021311559) 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, 111510655775 + 111510655776.

It is an arithmetic number, because the mean of its divisors is an integer number (111510655776).

Almost surely, 2^223021311551 is an apocalyptic number.

223021311551 is a deficient number, since it is larger than the sum of its proper divisors (1).

223021311551 is an equidigital number, since it uses as much as digits as its factorization.

223021311551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 223021311551 its reverse (155113120322), we get a palindrome (378134431873).

The spelling of 223021311551 in words is "two hundred twenty-three billion, twenty-one million, three hundred eleven thousand, five hundred fifty-one".