223453984781 has 2 divisors, whose sum is σ = 223453984782. Its totient is φ = 223453984780.

The previous prime is 223453984717. The next prime is 223453984783. The reversal of 223453984781 is 187489354322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173147532100 + 50306452681 = 416110^2 + 224291^2 .

It is a cyclic number.

It is not a de Polignac number, because 223453984781 - 2⁶ = 223453984717 is a prime.

It is a super-2 number, since 2×223453984781² (a number of 23 digits) contains 22 as substring.

Together with 223453984783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223453984783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111726992390 + 111726992391.

It is an arithmetic number, because the mean of its divisors is an integer number (111726992391).

Almost surely, 2^223453984781 is an apocalyptic number.

It is an amenable number.

223453984781 is a deficient number, since it is larger than the sum of its proper divisors (1).

223453984781 is an equidigital number, since it uses as much as digits as its factorization.

223453984781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 56.

The spelling of 223453984781 in words is "two hundred twenty-three billion, four hundred fifty-three million, nine hundred eighty-four thousand, seven hundred eighty-one".