16158101 has 4 divisors (see below), whose sum is σ = 16178604. Its totient is φ = 16137600.

The previous prime is 16158091. The next prime is 16158179. The reversal of 16158101 is 10185161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10185161 = 7 ⋅1455023.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 4774225 = 3374^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 16158101 - 2²² = 11963797 is a prime.

It is a super-2 number, since 2×16158101² = 522168455852402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16158001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9020 + ... + 10661.

It is an arithmetic number, because the mean of its divisors is an integer number (4044651).

Almost surely, 2^16158101 is an apocalyptic number.

It is an amenable number.

16158101 is a deficient number, since it is larger than the sum of its proper divisors (20503).

16158101 is an equidigital number, since it uses as much as digits as its factorization.

16158101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20502.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 16158101 is about 4019.7140445559. The cubic root of 16158101 is about 252.8114693713.

The spelling of 16158101 in words is "sixteen million, one hundred fifty-eight thousand, one hundred one".