145112231 has 4 divisors (see below), whose sum is σ = 158304264. Its totient is φ = 131920200.

The previous prime is 145112213. The next prime is 145112263. The reversal of 145112231 is 132211541.

145112231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 145112231 - 2¹⁸ = 144850087 is a prime.

It is a super-2 number, since 2×145112231² = 42115119171594722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145112131) 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, 6596000 + ... + 6596021.

It is an arithmetic number, because the mean of its divisors is an integer number (39576066).

Almost surely, 2^145112231 is an apocalyptic number.

145112231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145112231 is a deficient number, since it is larger than the sum of its proper divisors (13192033).

145112231 is a wasteful number, since it uses less digits than its factorization.

145112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13192032.

The product of its digits is 240, while the sum is 20.

The square root of 145112231 is about 12046.2538160210. The cubic root of 145112231 is about 525.4942960685.

Adding to 145112231 its reverse (132211541), we get a palindrome (277323772).

The spelling of 145112231 in words is "one hundred forty-five million, one hundred twelve thousand, two hundred thirty-one".