223135531 has 4 divisors (see below), whose sum is σ = 223436592. Its totient is φ = 222834472.

The previous prime is 223135519. The next prime is 223135537. The reversal of 223135531 is 135531322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 223135531 - 2¹³ = 223127339 is a prime.

It is a super-3 number, since 3×223135531³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223135496 and 223135505.

It is not an unprimeable number, because it can be changed into a prime (223135537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149416 + ... + 150901.

It is an arithmetic number, because the mean of its divisors is an integer number (55859148).

Almost surely, 2^223135531 is an apocalyptic number.

223135531 is a deficient number, since it is larger than the sum of its proper divisors (301061).

223135531 is an equidigital number, since it uses as much as digits as its factorization.

223135531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301060.

The product of its digits is 2700, while the sum is 25.

The square root of 223135531 is about 14937.7217473081. The cubic root of 223135531 is about 606.5355261697.

Adding to 223135531 its reverse (135531322), we get a palindrome (358666853).

The spelling of 223135531 in words is "two hundred twenty-three million, one hundred thirty-five thousand, five hundred thirty-one".