223531601 has 2 divisors, whose sum is σ = 223531602. Its totient is φ = 223531600.

The previous prime is 223531591. The next prime is 223531603. The reversal of 223531601 is 106135322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177955600 + 45576001 = 13340^2 + 6751^2 .

It is a cyclic number.

It is not a de Polignac number, because 223531601 - 2⁶ = 223531537 is a prime.

Together with 223531603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223531603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111765800 + 111765801.

It is an arithmetic number, because the mean of its divisors is an integer number (111765801).

Almost surely, 2^223531601 is an apocalyptic number.

It is an amenable number.

223531601 is a deficient number, since it is larger than the sum of its proper divisors (1).

223531601 is an equidigital number, since it uses as much as digits as its factorization.

223531601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 223531601 is about 14950.9732459128. The cubic root of 223531601 is about 606.8941849137.

Adding to 223531601 its reverse (106135322), we get a palindrome (329666923).

The spelling of 223531601 in words is "two hundred twenty-three million, five hundred thirty-one thousand, six hundred one".