16103231 has 4 divisors (see below), whose sum is σ = 16111392. Its totient is φ = 16095072.

The previous prime is 16103221. The next prime is 16103237. The reversal of 16103231 is 13230161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13230161 = 7 ⋅1890023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16103231 is a prime.

It is a super-2 number, since 2×16103231² = 518628097278722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16103237) 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, 935 + ... + 5751.

It is an arithmetic number, because the mean of its divisors is an integer number (4027848).

Almost surely, 2^16103231 is an apocalyptic number.

16103231 is a deficient number, since it is larger than the sum of its proper divisors (8161).

16103231 is an equidigital number, since it uses as much as digits as its factorization.

16103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8160.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 16103231 is about 4012.8831281262. The cubic root of 16103231 is about 252.5249774331.

Adding to 16103231 its reverse (13230161), we get a palindrome (29333392).

The spelling of 16103231 in words is "sixteen million, one hundred three thousand, two hundred thirty-one".