16240431 has 4 divisors (see below), whose sum is σ = 21653912. Its totient is φ = 10826952.

The previous prime is 16240429. The next prime is 16240481. The reversal of 16240431 is 13404261.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16240431 - 2¹ = 16240429 is a prime.

It is a super-2 number, since 2×16240431² = 527503198131522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16240398 and 16240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16240481) 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, 2706736 + ... + 2706741.

It is an arithmetic number, because the mean of its divisors is an integer number (5413478).

Almost surely, 2^16240431 is an apocalyptic number.

16240431 is a deficient number, since it is larger than the sum of its proper divisors (5413481).

16240431 is an equidigital number, since it uses as much as digits as its factorization.

16240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413480.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16240431 is about 4029.9418109943. The cubic root of 16240431 is about 253.2401236425.

Adding to 16240431 its reverse (13404261), we get a palindrome (29644692).

The spelling of 16240431 in words is "sixteen million, two hundred forty thousand, four hundred thirty-one".