233221420 has 24 divisors (see below), whose sum is σ = 490521024. Its totient is φ = 93144576.

The previous prime is 233221411. The next prime is 233221441. The reversal of 233221420 is 24122332.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4797 + ... + 22123.

It is an arithmetic number, because the mean of its divisors is an integer number (20438376).

Almost surely, 2^233221420 is an apocalyptic number.

233221420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233221420 is an abundant number, since it is smaller than the sum of its proper divisors (257299604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

233221420 is a wasteful number, since it uses less digits than its factorization.

233221420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18009 (or 18007 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 233221420 is about 15271.5886534440. The cubic root of 233221420 is about 615.5398085110.

Adding to 233221420 its reverse (24122332), we get a palindrome (257343752).

It can be divided in two parts, 23322 and 1420, that added together give a palindrome (24742).

The spelling of 233221420 in words is "two hundred thirty-three million, two hundred twenty-one thousand, four hundred twenty".