16506101 has 2 divisors, whose sum is σ = 16506102. Its totient is φ = 16506100.

The previous prime is 16506097. The next prime is 16506163. The reversal of 16506101 is 10160561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13359025 + 3147076 = 3655^2 + 1774^2 .

It is an emirp because it is prime and its reverse (10160561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16506101 - 2² = 16506097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253050 + 8253051.

It is an arithmetic number, because the mean of its divisors is an integer number (8253051).

Almost surely, 2^16506101 is an apocalyptic number.

It is an amenable number.

16506101 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506101 is an equidigital number, since it uses as much as digits as its factorization.

16506101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 16506101 is about 4062.7701140970. The cubic root of 16506101 is about 254.6135425115.

Adding to 16506101 its reverse (10160561), we get a palindrome (26666662).

The spelling of 16506101 in words is "sixteen million, five hundred six thousand, one hundred one".