2116642531 has 8 divisors (see below), whose sum is σ = 2132884944. Its totient is φ = 2100440160.

The previous prime is 2116642513. The next prime is 2116642553. The reversal of 2116642531 is 1352466112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2116642531 - 2⁵ = 2116642499 is a prime.

It is a super-2 number, since 2×2116642531² = 8960351208076171922, 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 = 2116642493 and 2116642502.

It is not an unprimeable number, because it can be changed into a prime (2116642501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100761 + ... + 119941.

It is an arithmetic number, because the mean of its divisors is an integer number (266610618).

Almost surely, 2^2116642531 is an apocalyptic number.

2116642531 is a deficient number, since it is larger than the sum of its proper divisors (16242413).

2116642531 is a wasteful number, since it uses less digits than its factorization.

2116642531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021.

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

The square root of 2116642531 is about 46006.9835025075. The cubic root of 2116642531 is about 1283.9531372910.

The spelling of 2116642531 in words is "two billion, one hundred sixteen million, six hundred forty-two thousand, five hundred thirty-one".