2116431361 has 4 divisors (see below), whose sum is σ = 2308834224. Its totient is φ = 1924028500.

The previous prime is 2116431329. The next prime is 2116431367. The reversal of 2116431361 is 1631346112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2116431361 - 2⁵ = 2116431329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116431367) 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, 96201415 + ... + 96201436.

It is an arithmetic number, because the mean of its divisors is an integer number (577208556).

Almost surely, 2^2116431361 is an apocalyptic number.

It is an amenable number.

2116431361 is a deficient number, since it is larger than the sum of its proper divisors (192402863).

2116431361 is a wasteful number, since it uses less digits than its factorization.

2116431361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192402862.

The product of its digits is 2592, while the sum is 28.

The square root of 2116431361 is about 46004.6884675899. The cubic root of 2116431361 is about 1283.9104373708.

Adding to 2116431361 its reverse (1631346112), we get a palindrome (3747777473).

It can be divided in two parts, 21164 and 31361, that added together give a palindrome (52525).

The spelling of 2116431361 in words is "two billion, one hundred sixteen million, four hundred thirty-one thousand, three hundred sixty-one".