213993013 has 4 divisors (see below), whose sum is σ = 230454028. Its totient is φ = 197532000.

The previous prime is 213992971. The next prime is 213993047. The reversal of 213993013 is 310399312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 126720049 + 87272964 = 11257^2 + 9342^2 .

It is a cyclic number.

It is not a de Polignac number, because 213993013 - 2⁹ = 213992501 is a prime.

It is a super-2 number, since 2×213993013² = 91586019225636338, which contains 22 as substring.

It is the 14629-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213993613) by changing a digit.

It is a nontrivial repunit in base 14628.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8230488 + ... + 8230513.

It is an arithmetic number, because the mean of its divisors is an integer number (57613507).

Almost surely, 2^213993013 is an apocalyptic number.

It is an amenable number.

213993013 is a deficient number, since it is larger than the sum of its proper divisors (16461015).

213993013 is a wasteful number, since it uses less digits than its factorization.

213993013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16461014.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 213993013 is about 14628.5000256349. The cubic root of 213993013 is about 598.1358932113.

The spelling of 213993013 in words is "two hundred thirteen million, nine hundred ninety-three thousand, thirteen".