213604273 has 2 divisors, whose sum is σ = 213604274. Its totient is φ = 213604272.

The previous prime is 213604231. The next prime is 213604283. The reversal of 213604273 is 372406312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201157489 + 12446784 = 14183^2 + 3528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213604273 is a prime.

It is not a weakly prime, because it can be changed into another prime (213604283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106802136 + 106802137.

It is an arithmetic number, because the mean of its divisors is an integer number (106802137).

Almost surely, 2^213604273 is an apocalyptic number.

It is an amenable number.

213604273 is a deficient number, since it is larger than the sum of its proper divisors (1).

213604273 is an equidigital number, since it uses as much as digits as its factorization.

213604273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 213604273 is about 14615.2069092435. The cubic root of 213604273 is about 597.7734821767.

Subtracting from 213604273 its product of nonzero digits (6048), we obtain a square (213598225 = 14615²).

The spelling of 213604273 in words is "two hundred thirteen million, six hundred four thousand, two hundred seventy-three".