16123431 has 8 divisors (see below), whose sum is σ = 21523824. Its totient is φ = 10736000.

The previous prime is 16123421. The next prime is 16123447. The reversal of 16123431 is 13432161.

16123431 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16123431 - 2⁵ = 16123399 is a prime.

It is a super-2 number, since 2×16123431² = 519930054423522, which contains 22 as substring.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 16123398 and 16123407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16123421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181 + ... + 5681.

It is an arithmetic number, because the mean of its divisors is an integer number (2690478).

Almost surely, 2^16123431 is an apocalyptic number.

16123431 is a deficient number, since it is larger than the sum of its proper divisors (5400393).

16123431 is an equidigital number, since it uses as much as digits as its factorization.

16123431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6481.

The product of its digits is 432, while the sum is 21.

The square root of 16123431 is about 4015.3992329531. The cubic root of 16123431 is about 252.6305229831.

Adding to 16123431 its reverse (13432161), we get a palindrome (29555592).

The spelling of 16123431 in words is "sixteen million, one hundred twenty-three thousand, four hundred thirty-one".