145313231 has 8 divisors (see below), whose sum is σ = 166615680. Its totient is φ = 124146648.

The previous prime is 145313221. The next prime is 145313261. The reversal of 145313231 is 132313541.

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 145313231 - 2⁶ = 145313167 is a prime.

It is a super-2 number, since 2×145313231² = 42231870207318722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145313197 and 145313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145313221) 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, 31661 + ... + 35958.

It is an arithmetic number, because the mean of its divisors is an integer number (20826960).

Almost surely, 2^145313231 is an apocalyptic number.

145313231 is a deficient number, since it is larger than the sum of its proper divisors (21302449).

145313231 is an equidigital number, since it uses as much as digits as its factorization.

145313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67933.

The product of its digits is 1080, while the sum is 23.

The square root of 145313231 is about 12054.5937716706. The cubic root of 145313231 is about 525.7368109420.

Adding to 145313231 its reverse (132313541), we get a palindrome (277626772).

The spelling of 145313231 in words is "one hundred forty-five million, three hundred thirteen thousand, two hundred thirty-one".