213013503 has 16 divisors (see below), whose sum is σ = 332185600. Its totient is φ = 134534520.

The previous prime is 213013501. The next prime is 213013517. The reversal of 213013503 is 305310312.

It is not a de Polignac number, because 213013503 - 2¹ = 213013501 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 (213013501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207103 + ... + 208128.

It is an arithmetic number, because the mean of its divisors is an integer number (20761600).

Almost surely, 2^213013503 is an apocalyptic number.

213013503 is a deficient number, since it is larger than the sum of its proper divisors (119172097).

213013503 is a wasteful number, since it uses less digits than its factorization.

213013503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415259 (or 415253 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 213013503 is about 14594.9821171525. The cubic root of 213013503 is about 597.2218816169.

Adding to 213013503 its reverse (305310312), we get a palindrome (518323815).

The spelling of 213013503 in words is "two hundred thirteen million, thirteen thousand, five hundred three".