153032421 has 4 divisors (see below), whose sum is σ = 204043232. Its totient is φ = 102021612.

The previous prime is 153032339. The next prime is 153032431. The reversal of 153032421 is 124230351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 153032421 - 2⁷ = 153032293 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 (153032431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25505401 + ... + 25505406.

It is an arithmetic number, because the mean of its divisors is an integer number (51010808).

Almost surely, 2^153032421 is an apocalyptic number.

It is an amenable number.

153032421 is a deficient number, since it is larger than the sum of its proper divisors (51010811).

153032421 is an equidigital number, since it uses as much as digits as its factorization.

153032421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51010810.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 153032421 is about 12370.6273486837. The cubic root of 153032421 is about 534.8858999112.

Adding to 153032421 its reverse (124230351), we get a palindrome (277262772).

The spelling of 153032421 in words is "one hundred fifty-three million, thirty-two thousand, four hundred twenty-one".