2116154631 has 4 divisors (see below), whose sum is σ = 2821539512. Its totient is φ = 1410769752.

The previous prime is 2116154627. The next prime is 2116154641. The reversal of 2116154631 is 1364516112.

It is a happy number.

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

It is not a de Polignac number, because 2116154631 - 2² = 2116154627 is a prime.

It is a super-2 number, since 2×2116154631² = 8956220844605492322, 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 (2116154641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352692436 + ... + 352692441.

It is an arithmetic number, because the mean of its divisors is an integer number (705384878).

Almost surely, 2^2116154631 is an apocalyptic number.

2116154631 is a deficient number, since it is larger than the sum of its proper divisors (705384881).

2116154631 is an equidigital number, since it uses as much as digits as its factorization.

2116154631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705384880.

The product of its digits is 4320, while the sum is 30.

The square root of 2116154631 is about 46001.6807410338. The cubic root of 2116154631 is about 1283.8544765006.

The spelling of 2116154631 in words is "two billion, one hundred sixteen million, one hundred fifty-four thousand, six hundred thirty-one".