16212173 has 2 divisors, whose sum is σ = 16212174. Its totient is φ = 16212172.

The previous prime is 16212139. The next prime is 16212181. The reversal of 16212173 is 37121261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12264004 + 3948169 = 3502^2 + 1987^2 .

It is a cyclic number.

It is not a de Polignac number, because 16212173 - 2⁸ = 16211917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16212103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8106086 + 8106087.

It is an arithmetic number, because the mean of its divisors is an integer number (8106087).

Almost surely, 2^16212173 is an apocalyptic number.

It is an amenable number.

16212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

16212173 is an equidigital number, since it uses as much as digits as its factorization.

16212173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 16212173 is about 4026.4342786143. The cubic root of 16212173 is about 253.0931609194.

The spelling of 16212173 in words is "sixteen million, two hundred twelve thousand, one hundred seventy-three".