2116493251 has 4 divisors (see below), whose sum is σ = 2240992872. Its totient is φ = 1991993632.

The previous prime is 2116493243. The next prime is 2116493261. The reversal of 2116493251 is 1523946112.

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

It is not a de Polignac number, because 2116493251 - 2³ = 2116493243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116493231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62249785 + ... + 62249818.

It is an arithmetic number, because the mean of its divisors is an integer number (560248218).

Almost surely, 2^2116493251 is an apocalyptic number.

2116493251 is a deficient number, since it is larger than the sum of its proper divisors (124499621).

2116493251 is a wasteful number, since it uses less digits than its factorization.

2116493251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124499620.

The product of its digits is 12960, while the sum is 34.

The square root of 2116493251 is about 46005.3611115053. The cubic root of 2116493251 is about 1283.9229522176.

The spelling of 2116493251 in words is "two billion, one hundred sixteen million, four hundred ninety-three thousand, two hundred fifty-one".