213128057269 has 2 divisors, whose sum is σ = 213128057270. Its totient is φ = 213128057268.

The previous prime is 213128057243. The next prime is 213128057281. The reversal of 213128057269 is 962750821312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211866884100 + 1261173169 = 460290^2 + 35513^2 .

It is a cyclic number.

It is not a de Polignac number, because 213128057269 - 2³⁵ = 178768318901 is a prime.

It is a super-2 number, since 2×213128057269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213128057209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106564028634 + 106564028635.

It is an arithmetic number, because the mean of its divisors is an integer number (106564028635).

Almost surely, 2^213128057269 is an apocalyptic number.

It is an amenable number.

213128057269 is a deficient number, since it is larger than the sum of its proper divisors (1).

213128057269 is an equidigital number, since it uses as much as digits as its factorization.

213128057269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 213128057269 in words is "two hundred thirteen billion, one hundred twenty-eight million, fifty-seven thousand, two hundred sixty-nine".