213315577 has 2 divisors, whose sum is σ = 213315578. Its totient is φ = 213315576.

The previous prime is 213315569. The next prime is 213315581. The reversal of 213315577 is 775513312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212693056 + 622521 = 14584^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 213315577 - 2³ = 213315569 is a prime.

It is not a weakly prime, because it can be changed into another prime (213315587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106657788 + 106657789.

It is an arithmetic number, because the mean of its divisors is an integer number (106657789).

Almost surely, 2^213315577 is an apocalyptic number.

It is an amenable number.

213315577 is a deficient number, since it is larger than the sum of its proper divisors (1).

213315577 is an equidigital number, since it uses as much as digits as its factorization.

213315577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 34.

The square root of 213315577 is about 14605.3270076366. The cubic root of 213315577 is about 597.5040546401.

Adding to 213315577 its reverse (775513312), we get a palindrome (988828889).

The spelling of 213315577 in words is "two hundred thirteen million, three hundred fifteen thousand, five hundred seventy-seven".