153004221 has 24 divisors (see below), whose sum is σ = 229771360. Its totient is φ = 101745072.

The previous prime is 153004217. The next prime is 153004237. The reversal of 153004221 is 122400351.

It is not a de Polignac number, because 153004221 - 2² = 153004217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 153004194 and 153004203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153004021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177690 + ... + 178548.

Almost surely, 2^153004221 is an apocalyptic number.

It is an amenable number.

153004221 is a deficient number, since it is larger than the sum of its proper divisors (76767139).

153004221 is an frugal number, since it uses more digits than its factorization.

153004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 153004221 is about 12369.4874994884. The cubic root of 153004221 is about 534.8530425840.

Adding to 153004221 its reverse (122400351), we get a palindrome (275404572).

The spelling of 153004221 in words is "one hundred fifty-three million, four thousand, two hundred twenty-one".