16159431 has 4 divisors (see below), whose sum is σ = 21545912. Its totient is φ = 10772952.

The previous prime is 16159427. The next prime is 16159441. The reversal of 16159431 is 13495161.

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

It is not a de Polignac number, because 16159431 - 2² = 16159427 is a prime.

It is a super-2 number, since 2×16159431² = 522254420487522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16159441) 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, 2693236 + ... + 2693241.

It is an arithmetic number, because the mean of its divisors is an integer number (5386478).

Almost surely, 2^16159431 is an apocalyptic number.

16159431 is a deficient number, since it is larger than the sum of its proper divisors (5386481).

16159431 is an equidigital number, since it uses as much as digits as its factorization.

16159431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5386480.

The product of its digits is 3240, while the sum is 30.

The square root of 16159431 is about 4019.8794758052. The cubic root of 16159431 is about 252.8184056243.

The spelling of 16159431 in words is "sixteen million, one hundred fifty-nine thousand, four hundred thirty-one".