153445221 has 12 divisors (see below), whose sum is σ = 221952640. Its totient is φ = 102153960.

The previous prime is 153445207. The next prime is 153445249. The reversal of 153445221 is 122544351.

It is not a de Polignac number, because 153445221 - 2⁶ = 153445157 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 (153445261) 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 11 ways as a sum of consecutive naturals, for example, 4885 + ... + 18186.

Almost surely, 2^153445221 is an apocalyptic number.

It is an amenable number.

153445221 is a deficient number, since it is larger than the sum of its proper divisors (68507419).

153445221 is a wasteful number, since it uses less digits than its factorization.

153445221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23816 (or 23813 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 153445221 is about 12387.3007955729. The cubic root of 153445221 is about 535.3664139108.

Adding to 153445221 its reverse (122544351), we get a palindrome (275989572).

The spelling of 153445221 in words is "one hundred fifty-three million, four hundred forty-five thousand, two hundred twenty-one".