2111534431 has 4 divisors (see below), whose sum is σ = 2113718992. Its totient is φ = 2109349872.

The previous prime is 2111534371. The next prime is 2111534443. The reversal of 2111534431 is 1344351112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111534431 - 2¹¹ = 2111532383 is a prime.

It is a super-2 number, since 2×2111534431² = 8917155306596987522, 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 = 2111534396 and 2111534405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111534471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090830 + ... + 1092763.

It is an arithmetic number, because the mean of its divisors is an integer number (528429748).

Almost surely, 2^2111534431 is an apocalyptic number.

2111534431 is a deficient number, since it is larger than the sum of its proper divisors (2184561).

2111534431 is an equidigital number, since it uses as much as digits as its factorization.

2111534431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184560.

The product of its digits is 1440, while the sum is 25.

The square root of 2111534431 is about 45951.4355706108. The cubic root of 2111534431 is about 1282.9194492778.

Adding to 2111534431 its reverse (1344351112), we get a palindrome (3455885543).

The spelling of 2111534431 in words is "two billion, one hundred eleven million, five hundred thirty-four thousand, four hundred thirty-one".