213403613 has 2 divisors, whose sum is σ = 213403614. Its totient is φ = 213403612.

The previous prime is 213403571. The next prime is 213403627. The reversal of 213403613 is 316304312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166590649 + 46812964 = 12907^2 + 6842^2 .

It is a cyclic number.

It is not a de Polignac number, because 213403613 - 2⁶ = 213403549 is a prime.

It is a super-2 number, since 2×213403613² = 91082204082907538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213403633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106701806 + 106701807.

It is an arithmetic number, because the mean of its divisors is an integer number (106701807).

Almost surely, 2^213403613 is an apocalyptic number.

It is an amenable number.

213403613 is a deficient number, since it is larger than the sum of its proper divisors (1).

213403613 is an equidigital number, since it uses as much as digits as its factorization.

213403613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 213403613 is about 14608.3405286158. The cubic root of 213403613 is about 597.5862405936.

Adding to 213403613 its reverse (316304312), we get a palindrome (529707925).

The spelling of 213403613 in words is "two hundred thirteen million, four hundred three thousand, six hundred thirteen".