16218157 has 2 divisors, whose sum is σ = 16218158. Its totient is φ = 16218156.

The previous prime is 16218133. The next prime is 16218161. The reversal of 16218157 is 75181261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13169641 + 3048516 = 3629^2 + 1746^2 .

It is a cyclic number.

It is not a de Polignac number, because 16218157 - 2⁷ = 16218029 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16218107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8109078 + 8109079.

It is an arithmetic number, because the mean of its divisors is an integer number (8109079).

Almost surely, 2^16218157 is an apocalyptic number.

It is an amenable number.

16218157 is a deficient number, since it is larger than the sum of its proper divisors (1).

16218157 is an equidigital number, since it uses as much as digits as its factorization.

16218157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 16218157 is about 4027.1772993003. The cubic root of 16218157 is about 253.1242964366.

The spelling of 16218157 in words is "sixteen million, two hundred eighteen thousand, one hundred fifty-seven".