223633428509 has 2 divisors, whose sum is σ = 223633428510. Its totient is φ = 223633428508.

The previous prime is 223633428467. The next prime is 223633428583. The reversal of 223633428509 is 905824336322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128906131225 + 94727297284 = 359035^2 + 307778^2 .

It is a cyclic number.

It is not a de Polignac number, because 223633428509 - 2⁸ = 223633428253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223633628509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111816714254 + 111816714255.

It is an arithmetic number, because the mean of its divisors is an integer number (111816714255).

Almost surely, 2^223633428509 is an apocalyptic number.

It is an amenable number.

223633428509 is a deficient number, since it is larger than the sum of its proper divisors (1).

223633428509 is an equidigital number, since it uses as much as digits as its factorization.

223633428509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 223633428509 in words is "two hundred twenty-three billion, six hundred thirty-three million, four hundred twenty-eight thousand, five hundred nine".