16040831 has 2 divisors, whose sum is σ = 16040832. Its totient is φ = 16040830.

The previous prime is 16040803. The next prime is 16040833. The reversal of 16040831 is 13804061.

It is a strong prime.

It is an emirp because it is prime and its reverse (13804061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16040831 is a prime.

It is a super-2 number, since 2×16040831² = 514616518341122, which contains 22 as substring.

Together with 16040833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16040797 and 16040806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16040833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8020415 + 8020416.

It is an arithmetic number, because the mean of its divisors is an integer number (8020416).

Almost surely, 2^16040831 is an apocalyptic number.

16040831 is a deficient number, since it is larger than the sum of its proper divisors (1).

16040831 is an equidigital number, since it uses as much as digits as its factorization.

16040831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 16040831 is about 4005.1006229557. The cubic root of 16040831 is about 252.1983772200.

Adding to 16040831 its reverse (13804061), we get a palindrome (29844892).

The spelling of 16040831 in words is "sixteen million, forty thousand, eight hundred thirty-one".