16431396227 has 4 divisors (see below), whose sum is σ = 16431866976. Its totient is φ = 16430925480.

The previous prime is 16431396197. The next prime is 16431396281. The reversal of 16431396227 is 72269313461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72269313461 = 599 ⋅120649939.

It is a cyclic number.

It is not a de Polignac number, because 16431396227 - 2¹⁶ = 16431330691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16431596227) 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, 178424 + ... + 254357.

It is an arithmetic number, because the mean of its divisors is an integer number (4107966744).

Almost surely, 2^16431396227 is an apocalyptic number.

16431396227 is a deficient number, since it is larger than the sum of its proper divisors (470749).

16431396227 is an equidigital number, since it uses as much as digits as its factorization.

16431396227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470748.

The product of its digits is 326592, while the sum is 44.

The spelling of 16431396227 in words is "sixteen billion, four hundred thirty-one million, three hundred ninety-six thousand, two hundred twenty-seven".