153204021 has 8 divisors (see below), whose sum is σ = 226968960. Its totient is φ = 102135996.

The previous prime is 153203957. The next prime is 153204043. The reversal of 153204021 is 120402351.

It is not a de Polignac number, because 153204021 - 2⁶ = 153203957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 153203985 and 153204003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153204421) 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 7 ways as a sum of consecutive naturals, for example, 2837085 + ... + 2837138.

It is an arithmetic number, because the mean of its divisors is an integer number (28371120).

Almost surely, 2^153204021 is an apocalyptic number.

It is an amenable number.

153204021 is a deficient number, since it is larger than the sum of its proper divisors (73764939).

153204021 is an equidigital number, since it uses as much as digits as its factorization.

153204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674232 (or 5674226 counting only the distinct ones).

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

The square root of 153204021 is about 12377.5611895074. The cubic root of 153204021 is about 535.0857532789.

Adding to 153204021 its reverse (120402351), we get a palindrome (273606372).

The spelling of 153204021 in words is "one hundred fifty-three million, two hundred four thousand, twenty-one".