213551228273 has 2 divisors, whose sum is σ = 213551228274. Its totient is φ = 213551228272.

The previous prime is 213551228257. The next prime is 213551228281. The reversal of 213551228273 is 372822155312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213303575104 + 247653169 = 461848^2 + 15737^2 .

It is a cyclic number.

It is not a de Polignac number, because 213551228273 - 2⁴ = 213551228257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213551228273.

It is not a weakly prime, because it can be changed into another prime (213551228203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106775614136 + 106775614137.

It is an arithmetic number, because the mean of its divisors is an integer number (106775614137).

Almost surely, 2^213551228273 is an apocalyptic number.

It is an amenable number.

213551228273 is a deficient number, since it is larger than the sum of its proper divisors (1).

213551228273 is an equidigital number, since it uses as much as digits as its factorization.

213551228273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The spelling of 213551228273 in words is "two hundred thirteen billion, five hundred fifty-one million, two hundred twenty-eight thousand, two hundred seventy-three".