213145003 has 2 divisors, whose sum is σ = 213145004. Its totient is φ = 213145002.

The previous prime is 213145001. The next prime is 213145013. The reversal of 213145003 is 300541312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213145003 - 2¹ = 213145001 is a prime.

Together with 213145001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (213145001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106572501 + 106572502.

It is an arithmetic number, because the mean of its divisors is an integer number (106572502).

Almost surely, 2^213145003 is an apocalyptic number.

213145003 is a deficient number, since it is larger than the sum of its proper divisors (1).

213145003 is an equidigital number, since it uses as much as digits as its factorization.

213145003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 213145003 is about 14599.4863950757. The cubic root of 213145003 is about 597.3447510144.

Adding to 213145003 its reverse (300541312), we get a palindrome (513686315).

The spelling of 213145003 in words is "two hundred thirteen million, one hundred forty-five thousand, three".