213453313 has 4 divisors (see below), whose sum is σ = 217480788. Its totient is φ = 209425840.

The previous prime is 213453307. The next prime is 213453329. The reversal of 213453313 is 313354312.

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 192182769 + 21270544 = 13863^2 + 4612^2 .

It is a cyclic number.

It is not a de Polignac number, because 213453313 - 2¹³ = 213445121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213453013) 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, 2013658 + ... + 2013763.

It is an arithmetic number, because the mean of its divisors is an integer number (54370197).

Almost surely, 2^213453313 is an apocalyptic number.

It is an amenable number.

213453313 is a deficient number, since it is larger than the sum of its proper divisors (4027475).

213453313 is an equidigital number, since it uses as much as digits as its factorization.

213453313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027474.

The product of its digits is 3240, while the sum is 25.

The square root of 213453313 is about 14610.0415126036. The cubic root of 213453313 is about 597.6326280163.

Subtracting 213453313 from its reverse (313354312), we obtain a palindrome (99900999).

The spelling of 213453313 in words is "two hundred thirteen million, four hundred fifty-three thousand, three hundred thirteen".