16197131 has 4 divisors (see below), whose sum is σ = 16268712. Its totient is φ = 16125552.

The previous prime is 16197119. The next prime is 16197149. The reversal of 16197131 is 13179161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13179161 = 23 ⋅573007.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16197131 is a prime.

It is a super-2 number, since 2×16197131² = 524694105262322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16197094 and 16197103.

It is not an unprimeable number, because it can be changed into a prime (16197151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35450 + ... + 35903.

It is an arithmetic number, because the mean of its divisors is an integer number (4067178).

Almost surely, 2^16197131 is an apocalyptic number.

16197131 is a deficient number, since it is larger than the sum of its proper divisors (71581).

16197131 is an equidigital number, since it uses as much as digits as its factorization.

16197131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71580.

The product of its digits is 1134, while the sum is 29.

The square root of 16197131 is about 4024.5659393281. The cubic root of 16197131 is about 253.0148616203.

The spelling of 16197131 in words is "sixteen million, one hundred ninety-seven thousand, one hundred thirty-one".