223903681 has 2 divisors, whose sum is σ = 223903682. Its totient is φ = 223903680.

The previous prime is 223903679. The next prime is 223903711. The reversal of 223903681 is 186309322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146023056 + 77880625 = 12084^2 + 8825^2 .

It is a cyclic number.

It is not a de Polignac number, because 223903681 - 2¹ = 223903679 is a prime.

It is a super-2 number, since 2×223903681² = 100265716730699522, which contains 22 as substring.

Together with 223903679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (223900681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111951840 + 111951841.

It is an arithmetic number, because the mean of its divisors is an integer number (111951841).

Almost surely, 2^223903681 is an apocalyptic number.

It is an amenable number.

223903681 is a deficient number, since it is larger than the sum of its proper divisors (1).

223903681 is an equidigital number, since it uses as much as digits as its factorization.

223903681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 223903681 is about 14963.4114091674. The cubic root of 223903681 is about 607.2307339153.

The spelling of 223903681 in words is "two hundred twenty-three million, nine hundred three thousand, six hundred eighty-one".