145250213 has 4 divisors (see below), whose sum is σ = 145774860. Its totient is φ = 144725568.

The previous prime is 145250201. The next prime is 145250233. The reversal of 145250213 is 312052541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312052541 = 31 ⋅10066211.

It can be written as a sum of positive squares in 2 ways, for example, as 9597604 + 135652609 = 3098^2 + 11647^2 .

It is a cyclic number.

It is not a de Polignac number, because 145250213 - 2²² = 141055909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145250233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261908 + ... + 262461.

It is an arithmetic number, because the mean of its divisors is an integer number (36443715).

Almost surely, 2^145250213 is an apocalyptic number.

It is an amenable number.

145250213 is a deficient number, since it is larger than the sum of its proper divisors (524647).

145250213 is an equidigital number, since it uses as much as digits as its factorization.

145250213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524646.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145250213 is about 12051.9796299197. The cubic root of 145250213 is about 525.6608011789.

The spelling of 145250213 in words is "one hundred forty-five million, two hundred fifty thousand, two hundred thirteen".