2116431 has 6 divisors (see below), whose sum is σ = 3057080. Its totient is φ = 1410948.

The previous prime is 2116427. The next prime is 2116441. The reversal of 2116431 is 1346112.

It is a happy number.

2116431 is a `hidden beast` number, since 21 + 1 + 643 + 1 = 666.

It is not a de Polignac number, because 2116431 - 2² = 2116427 is a prime.

It is a super-2 number, since 2×2116431² = 8958560355522, 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 (2116441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117571 + ... + 117588.

2^2116431 is an apocalyptic number.

2116431 is a deficient number, since it is larger than the sum of its proper divisors (940649).

2116431 is a wasteful number, since it uses less digits than its factorization.

2116431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235165 (or 235162 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2116431 is about 1454.7958619683. The cubic root of 2116431 is about 128.3910364372.

The spelling of 2116431 in words is "two million, one hundred sixteen thousand, four hundred thirty-one".