145140223 has 4 divisors (see below), whose sum is σ = 145175320. Its totient is φ = 145105128.

The previous prime is 145140217. The next prime is 145140239. The reversal of 145140223 is 322041541.

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 145140223 - 2²¹ = 143043071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145140194 and 145140203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145140293) 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, 10365 + ... + 19942.

It is an arithmetic number, because the mean of its divisors is an integer number (36293830).

Almost surely, 2^145140223 is an apocalyptic number.

145140223 is a deficient number, since it is larger than the sum of its proper divisors (35097).

145140223 is an equidigital number, since it uses as much as digits as its factorization.

145140223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35096.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 145140223 is about 12047.4156149773. The cubic root of 145140223 is about 525.5280829991.

Adding to 145140223 its reverse (322041541), we get a palindrome (467181764).

The spelling of 145140223 in words is "one hundred forty-five million, one hundred forty thousand, two hundred twenty-three".