223540531 has 16 divisors (see below), whose sum is σ = 243216864. Its totient is φ = 204632064.

The previous prime is 223540517. The next prime is 223540547. The reversal of 223540531 is 135045322.

It is a cyclic number.

It is not a de Polignac number, because 223540531 - 2²⁵ = 189986099 is a prime.

It is a super-2 number, since 2×223540531² = 99940737999523922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223540496 and 223540505.

It is not an unprimeable number, because it can be changed into a prime (223540501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228315 + ... + 229291.

It is an arithmetic number, because the mean of its divisors is an integer number (15201054).

Almost surely, 2^223540531 is an apocalyptic number.

223540531 is a deficient number, since it is larger than the sum of its proper divisors (19676333).

223540531 is a wasteful number, since it uses less digits than its factorization.

223540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 223540531 is about 14951.2718856959. The cubic root of 223540531 is about 606.9022665344.

Adding to 223540531 its reverse (135045322), we get a palindrome (358585853).

The spelling of 223540531 in words is "two hundred twenty-three million, five hundred forty thousand, five hundred thirty-one".