145118231 has 2 divisors, whose sum is σ = 145118232. Its totient is φ = 145118230.

The previous prime is 145118221. The next prime is 145118243. The reversal of 145118231 is 132811541.

It is a weak prime.

It is an emirp because it is prime and its reverse (132811541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145118231 - 2¹⁰ = 145117207 is a prime.

It is a super-2 number, since 2×145118231² = 42118601937138722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145118231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145118221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72559115 + 72559116.

It is an arithmetic number, because the mean of its divisors is an integer number (72559116).

Almost surely, 2^145118231 is an apocalyptic number.

145118231 is a deficient number, since it is larger than the sum of its proper divisors (1).

145118231 is an equidigital number, since it uses as much as digits as its factorization.

145118231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 145118231 is about 12046.5028535256. The cubic root of 145118231 is about 525.5015385601.

Adding to 145118231 its reverse (132811541), we get a palindrome (277929772).

The spelling of 145118231 in words is "one hundred forty-five million, one hundred eighteen thousand, two hundred thirty-one".