223515824281 has 2 divisors, whose sum is σ = 223515824282. Its totient is φ = 223515824280.

The previous prime is 223515824261. The next prime is 223515824309. The reversal of 223515824281 is 182428515322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169098598656 + 54417225625 = 411216^2 + 233275^2 .

It is a cyclic number.

It is not a de Polignac number, because 223515824281 - 2¹⁹ = 223515299993 is a prime.

It is a super-2 number, since 2×223515824281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (223515824261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111757912140 + 111757912141.

It is an arithmetic number, because the mean of its divisors is an integer number (111757912141).

Almost surely, 2^223515824281 is an apocalyptic number.

It is an amenable number.

223515824281 is a deficient number, since it is larger than the sum of its proper divisors (1).

223515824281 is an equidigital number, since it uses as much as digits as its factorization.

223515824281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307200, while the sum is 43.

The spelling of 223515824281 in words is "two hundred twenty-three billion, five hundred fifteen million, eight hundred twenty-four thousand, two hundred eighty-one".