223435231220681 has 2 divisors, whose sum is σ = 223435231220682. Its totient is φ = 223435231220680.

The previous prime is 223435231220657. The next prime is 223435231220699. The reversal of 223435231220681 is 186022132534322.

It is a happy number.

223435231220681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202399248970681 + 21035982250000 = 14226709^2 + 4586500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223435231220681 is a prime.

It is a super-2 number, since 2×223435231220681² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (223435231220651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111717615610340 + 111717615610341.

It is an arithmetic number, because the mean of its divisors is an integer number (111717615610341).

Almost surely, 2^{223435231220681} is an apocalyptic number.

It is an amenable number.

223435231220681 is a deficient number, since it is larger than the sum of its proper divisors (1).

223435231220681 is an equidigital number, since it uses as much as digits as its factorization.

223435231220681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 223435231220681 in words is "two hundred twenty-three trillion, four hundred thirty-five billion, two hundred thirty-one million, two hundred twenty thousand, six hundred eighty-one".