152433221 has 4 divisors (see below), whose sum is σ = 152490444. Its totient is φ = 152376000.

The previous prime is 152433217. The next prime is 152433233. The reversal of 152433221 is 122334251.

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 110040100 + 42393121 = 10490^2 + 6511^2 .

It is a cyclic number.

It is not a de Polignac number, because 152433221 - 2² = 152433217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152430221) 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, 24410 + ... + 30011.

It is an arithmetic number, because the mean of its divisors is an integer number (38122611).

Almost surely, 2^152433221 is an apocalyptic number.

It is an amenable number.

152433221 is a deficient number, since it is larger than the sum of its proper divisors (57223).

152433221 is an equidigital number, since it uses as much as digits as its factorization.

152433221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57222.

The product of its digits is 1440, while the sum is 23.

The square root of 152433221 is about 12346.3849364905. The cubic root of 152433221 is about 534.1868697031.

Adding to 152433221 its reverse (122334251), we get a palindrome (274767472).

The spelling of 152433221 in words is "one hundred fifty-two million, four hundred thirty-three thousand, two hundred twenty-one".