2118353431 has 2 divisors, whose sum is σ = 2118353432. Its totient is φ = 2118353430.

The previous prime is 2118353399. The next prime is 2118353509. The reversal of 2118353431 is 1343538112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2118353431 - 2⁵ = 2118353399 is a prime.

It is a super-2 number, since 2×2118353431² = 8974842517258943522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2118353393 and 2118353402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118350431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059176715 + 1059176716.

It is an arithmetic number, because the mean of its divisors is an integer number (1059176716).

Almost surely, 2^2118353431 is an apocalyptic number.

2118353431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118353431 is an equidigital number, since it uses as much as digits as its factorization.

2118353431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 2118353431 is about 46025.5736629105. The cubic root of 2118353431 is about 1284.2989875044.

The spelling of 2118353431 in words is "two billion, one hundred eighteen million, three hundred fifty-three thousand, four hundred thirty-one".