152231321 has 8 divisors (see below), whose sum is σ = 166233600. Its totient is φ = 138256240.

The previous prime is 152231293. The next prime is 152231323. The reversal of 152231321 is 123132251.

152231321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 152231321 - 2⁶ = 152231257 is a prime.

It is a super-3 number, since 3×152231321³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 152231293 and 152231302.

It is not an unprimeable number, because it can be changed into a prime (152231323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5960 + ... + 18438.

It is an arithmetic number, because the mean of its divisors is an integer number (20779200).

Almost surely, 2^152231321 is an apocalyptic number.

152231321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

152231321 is a deficient number, since it is larger than the sum of its proper divisors (14002279).

152231321 is a wasteful number, since it uses less digits than its factorization.

152231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13599.

The product of its digits is 360, while the sum is 20.

The square root of 152231321 is about 12338.2057447588. The cubic root of 152231321 is about 533.9509194278.

Adding to 152231321 its reverse (123132251), we get a palindrome (275363572).

The spelling of 152231321 in words is "one hundred fifty-two million, two hundred thirty-one thousand, three hundred twenty-one".