153243321 has 32 divisors (see below), whose sum is σ = 269733888. Its totient is φ = 74922240.

The previous prime is 153243317. The next prime is 153243373. The reversal of 153243321 is 123342351.

It is not a de Polignac number, because 153243321 - 2² = 153243317 is a prime.

It is a super-2 number, since 2×153243321² = 46967030862218082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 153243291 and 153243300.

It is not an unprimeable number, because it can be changed into a prime (153243121) 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 31 ways as a sum of consecutive naturals, for example, 15585 + ... + 23438.

It is an arithmetic number, because the mean of its divisors is an integer number (8429184).

Almost surely, 2^153243321 is an apocalyptic number.

153243321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

153243321 is a deficient number, since it is larger than the sum of its proper divisors (116490567).

153243321 is a wasteful number, since it uses less digits than its factorization.

153243321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39061.

The product of its digits is 2160, while the sum is 24.

The square root of 153243321 is about 12379.1486379314. The cubic root of 153243321 is about 535.1315028881.

Adding to 153243321 its reverse (123342351), we get a palindrome (276585672).

The spelling of 153243321 in words is "one hundred fifty-three million, two hundred forty-three thousand, three hundred twenty-one".