16940231 has 24 divisors (see below), whose sum is σ = 21939984. Its totient is φ = 12929280.

The previous prime is 16940221. The next prime is 16940239. The reversal of 16940231 is 13204961.

It is not a de Polignac number, because 16940231 - 2¹⁴ = 16923847 is a prime.

It is a super-2 number, since 2×16940231² = 573942852666722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16940231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16940239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28271 + ... + 28863.

It is an arithmetic number, because the mean of its divisors is an integer number (914166).

Almost surely, 2^16940231 is an apocalyptic number.

16940231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16940231 is a deficient number, since it is larger than the sum of its proper divisors (4999753).

16940231 is a wasteful number, since it uses less digits than its factorization.

16940231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16940231 is about 4115.8511877861. The cubic root of 16940231 is about 256.8264661455.

It can be divided in two parts, 16940 and 231, that added together give a palindrome (17171).

The spelling of 16940231 in words is "sixteen million, nine hundred forty thousand, two hundred thirty-one".