145541231 has 8 divisors (see below), whose sum is σ = 159139200. Its totient is φ = 132004440.

The previous prime is 145541183. The next prime is 145541261. The reversal of 145541231 is 132145541.

145541231 = T₇₈ + T₇₉ + ... + T₉₅₅.

145541231 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 145541231 - 2¹⁸ = 145279087 is a prime.

It is a super-2 number, since 2×145541231² = 42364499841990722, 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 145541231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145541261) 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, 10241 + ... + 19898.

It is an arithmetic number, because the mean of its divisors is an integer number (19892400).

Almost surely, 2^145541231 is an apocalyptic number.

145541231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145541231 is a deficient number, since it is larger than the sum of its proper divisors (13597969).

145541231 is a wasteful number, since it uses less digits than its factorization.

145541231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30589.

The product of its digits is 2400, while the sum is 26.

The square root of 145541231 is about 12064.0470406908. The cubic root of 145541231 is about 526.0116318805.

Adding to 145541231 its reverse (132145541), we get a palindrome (277686772).

The spelling of 145541231 in words is "one hundred forty-five million, five hundred forty-one thousand, two hundred thirty-one".