213903 has 6 divisors (see below), whose sum is σ = 308984. Its totient is φ = 142596.

The previous prime is 213901. The next prime is 213919. The reversal of 213903 is 309312.

It is not a de Polignac number, because 213903 - 2¹ = 213901 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213903.

It is not an unprimeable number, because it can be changed into a prime (213901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11875 + ... + 11892.

2²¹³⁹⁰³ is an apocalyptic number.

213903 is a deficient number, since it is larger than the sum of its proper divisors (95081).

213903 is a wasteful number, since it uses less digits than its factorization.

213903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23773 (or 23770 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 213903 is about 462.4964864731. The cubic root of 213903 is about 59.8052015773.

The spelling of 213903 in words is "two hundred thirteen thousand, nine hundred three".