16253431 has 4 divisors (see below), whose sum is σ = 16261992. Its totient is φ = 16244872.

The previous prime is 16253423. The next prime is 16253437. The reversal of 16253431 is 13435261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16253431 - 2³ = 16253423 is a prime.

It is a super-2 number, since 2×16253431² = 528348038543522, 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 = 16253396 and 16253405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16253437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16 + ... + 5701.

It is an arithmetic number, because the mean of its divisors is an integer number (4065498).

Almost surely, 2^16253431 is an apocalyptic number.

16253431 is a deficient number, since it is larger than the sum of its proper divisors (8561).

16253431 is an equidigital number, since it uses as much as digits as its factorization.

16253431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560.

The product of its digits is 2160, while the sum is 25.

The square root of 16253431 is about 4031.5544148628. The cubic root of 16253431 is about 253.3076761104.

Adding to 16253431 its reverse (13435261), we get a palindrome (29688692).

The spelling of 16253431 in words is "sixteen million, two hundred fifty-three thousand, four hundred thirty-one".