223013561 has 4 divisors (see below), whose sum is σ = 224490624. Its totient is φ = 221536500.

The previous prime is 223013551. The next prime is 223013563. The reversal of 223013561 is 165310322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165310322 = 2 ⋅82655161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223013561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223013563) 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, 738305 + ... + 738606.

It is an arithmetic number, because the mean of its divisors is an integer number (56122656).

Almost surely, 2^223013561 is an apocalyptic number.

It is an amenable number.

223013561 is a deficient number, since it is larger than the sum of its proper divisors (1477063).

223013561 is a wasteful number, since it uses less digits than its factorization.

223013561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477062.

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

The square root of 223013561 is about 14933.6385720293. The cubic root of 223013561 is about 606.4249915223.

Adding to 223013561 its reverse (165310322), we get a palindrome (388323883).

The spelling of 223013561 in words is "two hundred twenty-three million, thirteen thousand, five hundred sixty-one".