213842503 has 4 divisors (see below), whose sum is σ = 244391440. Its totient is φ = 183293568.

The previous prime is 213842501. The next prime is 213842509. The reversal of 213842503 is 305248312.

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 213842503 - 2¹ = 213842501 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 (213842501) 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, 15274458 + ... + 15274471.

It is an arithmetic number, because the mean of its divisors is an integer number (61097860).

Almost surely, 2^213842503 is an apocalyptic number.

213842503 is a deficient number, since it is larger than the sum of its proper divisors (30548937).

213842503 is an equidigital number, since it uses as much as digits as its factorization.

213842503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30548936.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 213842503 is about 14623.3547108726. The cubic root of 213842503 is about 597.9956292116.

The spelling of 213842503 in words is "two hundred thirteen million, eight hundred forty-two thousand, five hundred three".