223542531 has 8 divisors (see below), whose sum is σ = 331174160. Its totient is φ = 149028336.

The previous prime is 223542523. The next prime is 223542533. The reversal of 223542531 is 135245322.

It is a happy number.

223542531 is a `hidden beast` number, since 2 + 235 + 425 + 3 + 1 = 666.

It is not a de Polignac number, because 223542531 - 2³ = 223542523 is a prime.

It is a super-2 number, since 2×223542531² = 99942526331771922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8279353 = 223542531 / (2 + 2 + 3 + 5 + 4 + 2 + 5 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223542495 and 223542504.

It is not an unprimeable number, because it can be changed into a prime (223542533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4139650 + ... + 4139703.

It is an arithmetic number, because the mean of its divisors is an integer number (41396770).

Almost surely, 2^223542531 is an apocalyptic number.

223542531 is a deficient number, since it is larger than the sum of its proper divisors (107631629).

223542531 is an equidigital number, since it uses as much as digits as its factorization.

223542531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8279362 (or 8279356 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 223542531 is about 14951.3387694882. The cubic root of 223542531 is about 606.9040764984.

Adding to 223542531 its reverse (135245322), we get a palindrome (358787853).

The spelling of 223542531 in words is "two hundred twenty-three million, five hundred forty-two thousand, five hundred thirty-one".