213315511 has 2 divisors, whose sum is σ = 213315512. Its totient is φ = 213315510.

The previous prime is 213315493. The next prime is 213315569. The reversal of 213315511 is 115513312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213315511 - 2⁷ = 213315383 is a prime.

It is a super-3 number, since 3×213315511³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213315581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106657755 + 106657756.

It is an arithmetic number, because the mean of its divisors is an integer number (106657756).

Almost surely, 2^213315511 is an apocalyptic number.

213315511 is a deficient number, since it is larger than the sum of its proper divisors (1).

213315511 is an equidigital number, since it uses as much as digits as its factorization.

213315511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 213315511 is about 14605.3247481869. The cubic root of 213315511 is about 597.5039930173.

Adding to 213315511 its reverse (115513312), we get a palindrome (328828823).

The spelling of 213315511 in words is "two hundred thirteen million, three hundred fifteen thousand, five hundred eleven".