223531073 has 2 divisors, whose sum is σ = 223531074. Its totient is φ = 223531072.

The previous prime is 223531069. The next prime is 223531093. The reversal of 223531073 is 370135322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201412864 + 22118209 = 14192^2 + 4703^2 .

It is a cyclic number.

It is not a de Polignac number, because 223531073 - 2² = 223531069 is a prime.

It is a super-2 number, since 2×223531073² = 99932281193062658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (223531093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111765536 + 111765537.

It is an arithmetic number, because the mean of its divisors is an integer number (111765537).

Almost surely, 2^223531073 is an apocalyptic number.

It is an amenable number.

223531073 is a deficient number, since it is larger than the sum of its proper divisors (1).

223531073 is an equidigital number, since it uses as much as digits as its factorization.

223531073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 223531073 is about 14950.9555881890. The cubic root of 223531073 is about 606.8937070686.

Adding to 223531073 its reverse (370135322), we get a palindrome (593666395).

The spelling of 223531073 in words is "two hundred twenty-three million, five hundred thirty-one thousand, seventy-three".