213204154577 has 2 divisors, whose sum is σ = 213204154578. Its totient is φ = 213204154576.

The previous prime is 213204154547. The next prime is 213204154589. The reversal of 213204154577 is 775451402312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121639815361 + 91564339216 = 348769^2 + 302596^2 .

It is a cyclic number.

It is not a de Polignac number, because 213204154577 - 2¹⁰ = 213204153553 is a prime.

It is not a weakly prime, because it can be changed into another prime (213204154547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106602077288 + 106602077289.

It is an arithmetic number, because the mean of its divisors is an integer number (106602077289).

Almost surely, 2^213204154577 is an apocalyptic number.

It is an amenable number.

213204154577 is a deficient number, since it is larger than the sum of its proper divisors (1).

213204154577 is an equidigital number, since it uses as much as digits as its factorization.

213204154577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 41.

Adding to 213204154577 its reverse (775451402312), we get a palindrome (988655556889).

The spelling of 213204154577 in words is "two hundred thirteen billion, two hundred four million, one hundred fifty-four thousand, five hundred seventy-seven".