16540831 has 2 divisors, whose sum is σ = 16540832. Its totient is φ = 16540830.

The previous prime is 16540829. The next prime is 16540877. The reversal of 16540831 is 13804561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16540831 - 2¹ = 16540829 is a prime.

It is a super-2 number, since 2×16540831² = 547198180341122, which contains 22 as substring.

Together with 16540829, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16540831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16540801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270415 + 8270416.

It is an arithmetic number, because the mean of its divisors is an integer number (8270416).

Almost surely, 2^16540831 is an apocalyptic number.

16540831 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540831 is an equidigital number, since it uses as much as digits as its factorization.

16540831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 16540831 is about 4067.0420455166. The cubic root of 16540831 is about 254.7919923599.

It can be divided in two parts, 16540 and 831, that added together give a palindrome (17371).

The spelling of 16540831 in words is "sixteen million, five hundred forty thousand, eight hundred thirty-one".