221828234851 has 2 divisors, whose sum is σ = 221828234852. Its totient is φ = 221828234850.

The previous prime is 221828234813. The next prime is 221828234933. The reversal of 221828234851 is 158432828122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221828234851 - 2³⁵ = 187468496483 is a prime.

It is a super-2 number, since 2×221828234851² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221828235851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110914117425 + 110914117426.

It is an arithmetic number, because the mean of its divisors is an integer number (110914117426).

Almost surely, 2^221828234851 is an apocalyptic number.

221828234851 is a deficient number, since it is larger than the sum of its proper divisors (1).

221828234851 is an equidigital number, since it uses as much as digits as its factorization.

221828234851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 491520, while the sum is 46.

The spelling of 221828234851 in words is "two hundred twenty-one billion, eight hundred twenty-eight million, two hundred thirty-four thousand, eight hundred fifty-one".