223531001 has 2 divisors, whose sum is σ = 223531002. Its totient is φ = 223531000.

The previous prime is 223530959. The next prime is 223531027. The reversal of 223531001 is 100135322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207936400 + 15594601 = 14420^2 + 3949^2 .

It is a cyclic number.

It is not a de Polignac number, because 223531001 - 2¹⁴ = 223514617 is a prime.

It is a super-2 number, since 2×223531001² = 99932216816124002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (223531601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111765500 + 111765501.

It is an arithmetic number, because the mean of its divisors is an integer number (111765501).

Almost surely, 2^223531001 is an apocalyptic number.

It is an amenable number.

223531001 is a deficient number, since it is larger than the sum of its proper divisors (1).

223531001 is an equidigital number, since it uses as much as digits as its factorization.

223531001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 223531001 is about 14950.9531803160. The cubic root of 223531001 is about 606.8936419079.

Adding to 223531001 its reverse (100135322), we get a palindrome (323666323).

The spelling of 223531001 in words is "two hundred twenty-three million, five hundred thirty-one thousand, one".