145223305 has 16 divisors (see below), whose sum is σ = 176641920. Its totient is φ = 114605568.

The previous prime is 145223303. The next prime is 145223321. The reversal of 145223305 is 503322541.

It is a cyclic number.

It is not a de Polignac number, because 145223305 - 2¹ = 145223303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145223305.

It is not an unprimeable number, because it can be changed into a prime (145223303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215449 + ... + 216121.

It is an arithmetic number, because the mean of its divisors is an integer number (11040120).

Almost surely, 2^145223305 is an apocalyptic number.

It is an amenable number.

145223305 is a deficient number, since it is larger than the sum of its proper divisors (31418615).

145223305 is a wasteful number, since it uses less digits than its factorization.

145223305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 145223305 is about 12050.8632470873. The cubic root of 145223305 is about 525.6283391396.

Adding to 145223305 its reverse (503322541), we get a palindrome (648545846).

The spelling of 145223305 in words is "one hundred forty-five million, two hundred twenty-three thousand, three hundred five".