233001221 has 4 divisors (see below), whose sum is σ = 233047500. Its totient is φ = 232954944.

The previous prime is 233001211. The next prime is 233001229. The reversal of 233001221 is 122100332.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105062500 + 127938721 = 10250^2 + 11311^2 .

It is a cyclic number.

It is not a de Polignac number, because 233001221 - 2²⁶ = 165892357 is a prime.

It is a Duffinian number.

233001221 is a modest number, since divided by 1221 gives 233 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 233001196 and 233001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233001229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14516 + ... + 26013.

It is an arithmetic number, because the mean of its divisors is an integer number (58261875).

Almost surely, 2^233001221 is an apocalyptic number.

It is an amenable number.

233001221 is a deficient number, since it is larger than the sum of its proper divisors (46279).

233001221 is an equidigital number, since it uses as much as digits as its factorization.

233001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46278.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 233001221 is about 15264.3775176061. The cubic root of 233001221 is about 615.3460242374.

Adding to 233001221 its reverse (122100332), we get a palindrome (355101553).

The spelling of 233001221 in words is "two hundred thirty-three million, one thousand, two hundred twenty-one".