145220323 has 4 divisors (see below), whose sum is σ = 145957680. Its totient is φ = 144482968.

The previous prime is 145220269. The next prime is 145220329. The reversal of 145220323 is 323022541.

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 145220323 - 2¹³ = 145212131 is a prime.

It is a Duffinian number.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 145220294 and 145220303.

It is not an unprimeable number, because it can be changed into a prime (145220329) 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, 368383 + ... + 368776.

It is an arithmetic number, because the mean of its divisors is an integer number (36489420).

Almost surely, 2^145220323 is an apocalyptic number.

145220323 is a deficient number, since it is larger than the sum of its proper divisors (737357).

145220323 is an equidigital number, since it uses as much as digits as its factorization.

145220323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737356.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 145220323 is about 12050.7395208759. The cubic root of 145220323 is about 525.6247413827.

Adding to 145220323 its reverse (323022541), we get a palindrome (468242864).

The spelling of 145220323 in words is "one hundred forty-five million, two hundred twenty thousand, three hundred twenty-three".