153231121 has 4 divisors (see below), whose sum is σ = 153256932. Its totient is φ = 153205312.

The previous prime is 153231107. The next prime is 153231167. The reversal of 153231121 is 121132351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80299521 + 72931600 = 8961^2 + 8540^2 .

It is a cyclic number.

It is not a de Polignac number, because 153231121 - 2¹¹ = 153229073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153231521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981 + ... + 17533.

It is an arithmetic number, because the mean of its divisors is an integer number (38314233).

Almost surely, 2^153231121 is an apocalyptic number.

It is an amenable number.

153231121 is a deficient number, since it is larger than the sum of its proper divisors (25811).

153231121 is an equidigital number, since it uses as much as digits as its factorization.

153231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25810.

The product of its digits is 180, while the sum is 19.

The square root of 153231121 is about 12378.6558640266. The cubic root of 153231121 is about 535.1173015566.

Adding to 153231121 its reverse (121132351), we get a palindrome (274363472).

The spelling of 153231121 in words is "one hundred fifty-three million, two hundred thirty-one thousand, one hundred twenty-one".