145504213 has 2 divisors, whose sum is σ = 145504214. Its totient is φ = 145504212.

The previous prime is 145504211. The next prime is 145504243. The reversal of 145504213 is 312405541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102758769 + 42745444 = 10137^2 + 6538^2 .

It is a cyclic number.

It is not a de Polignac number, because 145504213 - 2¹ = 145504211 is a prime.

Together with 145504211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145504211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72752106 + 72752107.

It is an arithmetic number, because the mean of its divisors is an integer number (72752107).

Almost surely, 2^145504213 is an apocalyptic number.

It is an amenable number.

145504213 is a deficient number, since it is larger than the sum of its proper divisors (1).

145504213 is an equidigital number, since it uses as much as digits as its factorization.

145504213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145504213 is about 12062.5127150192. The cubic root of 145504213 is about 525.9670315759.

Adding to 145504213 its reverse (312405541), we get a palindrome (457909754).

The spelling of 145504213 in words is "one hundred forty-five million, five hundred four thousand, two hundred thirteen".