213338981 has 8 divisors (see below), whose sum is σ = 214493760. Its totient is φ = 212188032.

The previous prime is 213338959. The next prime is 213338989. The reversal of 213338981 is 189833312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213338981 - 2¹⁴ = 213322597 is a prime.

It is a super-2 number, since 2×213338981² = 91027041628236722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213338989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241166 + ... + 242048.

It is an arithmetic number, because the mean of its divisors is an integer number (26811720).

Almost surely, 2^213338981 is an apocalyptic number.

It is an amenable number.

213338981 is a deficient number, since it is larger than the sum of its proper divisors (1154779).

213338981 is an equidigital number, since it uses as much as digits as its factorization.

213338981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915.

The product of its digits is 31104, while the sum is 38.

The square root of 213338981 is about 14606.1282001768. The cubic root of 213338981 is about 597.5259056361.

It can be divided in two parts, 2133 and 38981, that added together give a palindrome (41114).

The spelling of 213338981 in words is "two hundred thirteen million, three hundred thirty-eight thousand, nine hundred eighty-one".