223030521 has 12 divisors (see below), whose sum is σ = 368177472. Its totient is φ = 127445976.

The previous prime is 223030477. The next prime is 223030541. The reversal of 223030521 is 125030322.

It is not a de Polignac number, because 223030521 - 2⁹ = 223030009 is a prime.

It is a super-2 number, since 2×223030521² = 99485226595062882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223030494 and 223030503.

It is not an unprimeable number, because it can be changed into a prime (223030541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1770021 + ... + 1770146.

It is an arithmetic number, because the mean of its divisors is an integer number (30681456).

Almost surely, 2^223030521 is an apocalyptic number.

223030521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

223030521 is a deficient number, since it is larger than the sum of its proper divisors (145146951).

223030521 is a wasteful number, since it uses less digits than its factorization.

223030521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540180 (or 3540177 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 223030521 is about 14934.2064067697. The cubic root of 223030521 is about 606.4403638418.

Adding to 223030521 its reverse (125030322), we get a palindrome (348060843).

The spelling of 223030521 in words is "two hundred twenty-three million, thirty thousand, five hundred twenty-one".