213102173 has 2 divisors, whose sum is σ = 213102174. Its totient is φ = 213102172.

The previous prime is 213102167. The next prime is 213102209. The reversal of 213102173 is 371201312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190081369 + 23020804 = 13787^2 + 4798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213102173 is a prime.

It is a super-2 number, since 2×213102173² = 90825072274643858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213102473) 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, 106551086 + 106551087.

It is an arithmetic number, because the mean of its divisors is an integer number (106551087).

Almost surely, 2^213102173 is an apocalyptic number.

It is an amenable number.

213102173 is a deficient number, since it is larger than the sum of its proper divisors (1).

213102173 is an equidigital number, since it uses as much as digits as its factorization.

213102173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 213102173 is about 14598.0194889581. The cubic root of 213102173 is about 597.3047375819.

Adding to 213102173 its reverse (371201312), we get a palindrome (584303485).

The spelling of 213102173 in words is "two hundred thirteen million, one hundred two thousand, one hundred seventy-three".