153135021 has 8 divisors (see below), whose sum is σ = 219886240. Its totient is φ = 94236912.

The previous prime is 153135013. The next prime is 153135023. The reversal of 153135021 is 120531351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 153135021 - 2³ = 153135013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153135023) 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, 1963231 + ... + 1963308.

It is an arithmetic number, because the mean of its divisors is an integer number (27485780).

Almost surely, 2^153135021 is an apocalyptic number.

It is an amenable number.

153135021 is a deficient number, since it is larger than the sum of its proper divisors (66751219).

153135021 is a wasteful number, since it uses less digits than its factorization.

153135021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926555.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 153135021 is about 12374.7735736861. The cubic root of 153135021 is about 535.0054106071.

Adding to 153135021 its reverse (120531351), we get a palindrome (273666372).

The spelling of 153135021 in words is "one hundred fifty-three million, one hundred thirty-five thousand, twenty-one".