221434341451 has 2 divisors, whose sum is σ = 221434341452. Its totient is φ = 221434341450.

The previous prime is 221434341419. The next prime is 221434341487. The reversal of 221434341451 is 154143434122.

221434341451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221434341451 - 2⁵ = 221434341419 is a prime.

It is not a weakly prime, because it can be changed into another prime (221434341251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110717170725 + 110717170726.

It is an arithmetic number, because the mean of its divisors is an integer number (110717170726).

Almost surely, 2^221434341451 is an apocalyptic number.

221434341451 is a deficient number, since it is larger than the sum of its proper divisors (1).

221434341451 is an equidigital number, since it uses as much as digits as its factorization.

221434341451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 34.

Adding to 221434341451 its reverse (154143434122), we get a palindrome (375577775573).

The spelling of 221434341451 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-one thousand, four hundred fifty-one".