145301230321 has 4 divisors (see below), whose sum is σ = 156478248052. Its totient is φ = 134124212592.

The previous prime is 145301230313. The next prime is 145301230351. The reversal of 145301230321 is 123032103541.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16993990321 + 128307240000 = 130361^2 + 358200^2 .

It is a cyclic number.

It is not a de Polignac number, because 145301230321 - 2³ = 145301230313 is a prime.

It is a super-2 number, since 2×145301230321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145301230301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5588508846 + ... + 5588508871.

It is an arithmetic number, because the mean of its divisors is an integer number (39119562013).

Almost surely, 2^145301230321 is an apocalyptic number.

It is an amenable number.

145301230321 is a deficient number, since it is larger than the sum of its proper divisors (11177017731).

145301230321 is a wasteful number, since it uses less digits than its factorization.

145301230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177017730.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 145301230321 its reverse (123032103541), we get a palindrome (268333333862).

The spelling of 145301230321 in words is "one hundred forty-five billion, three hundred one million, two hundred thirty thousand, three hundred twenty-one".