145032213 has 4 divisors (see below), whose sum is σ = 193376288. Its totient is φ = 96688140.

The previous prime is 145032191. The next prime is 145032233. The reversal of 145032213 is 312230541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145032213 - 2¹⁰ = 145031189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145032213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145032233) 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, 24172033 + ... + 24172038.

It is an arithmetic number, because the mean of its divisors is an integer number (48344072).

Almost surely, 2^145032213 is an apocalyptic number.

It is an amenable number.

145032213 is a deficient number, since it is larger than the sum of its proper divisors (48344075).

145032213 is an equidigital number, since it uses as much as digits as its factorization.

145032213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48344074.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 145032213 is about 12042.9320765335. The cubic root of 145032213 is about 525.3976886965.

Adding to 145032213 its reverse (312230541), we get a palindrome (457262754).

The spelling of 145032213 in words is "one hundred forty-five million, thirty-two thousand, two hundred thirteen".