233220531 has 16 divisors (see below), whose sum is σ = 314705664. Its totient is φ = 153615264.

The previous prime is 233220527. The next prime is 233220541. The reversal of 233220531 is 135022332.

It is not a de Polignac number, because 233220531 - 2² = 233220527 is a prime.

It is a super-2 number, since 2×233220531² = 108783632159843922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 233220498 and 233220507.

It is not an unprimeable number, because it can be changed into a prime (233220541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245800 + ... + 246746.

It is an arithmetic number, because the mean of its divisors is an integer number (19669104).

Almost surely, 2^233220531 is an apocalyptic number.

233220531 is a deficient number, since it is larger than the sum of its proper divisors (81485133).

233220531 is a wasteful number, since it uses less digits than its factorization.

233220531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 233220531 is about 15271.5595470797. The cubic root of 233220531 is about 615.5390263993.

Adding to 233220531 its reverse (135022332), we get a palindrome (368242863).

The spelling of 233220531 in words is "two hundred thirty-three million, two hundred twenty thousand, five hundred thirty-one".