213770503 has 4 divisors (see below), whose sum is σ = 213810480. Its totient is φ = 213730528.

The previous prime is 213770489. The next prime is 213770519. The reversal of 213770503 is 305077312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213770503 - 2¹⁷ = 213639431 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 (213770003) 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, 10450 + ... + 23167.

It is an arithmetic number, because the mean of its divisors is an integer number (53452620).

Almost surely, 2^213770503 is an apocalyptic number.

213770503 is a deficient number, since it is larger than the sum of its proper divisors (39977).

213770503 is an equidigital number, since it uses as much as digits as its factorization.

213770503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39976.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 213770503 is about 14620.8926882048. The cubic root of 213770503 is about 597.9285073535.

The spelling of 213770503 in words is "two hundred thirteen million, seven hundred seventy thousand, five hundred three".