2156918267 has 8 divisors (see below), whose sum is σ = 2467074816. Its totient is φ = 1847268072.

The previous prime is 2156918251. The next prime is 2156918303. The reversal of 2156918267 is 7628196512.

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 2156918267 - 2⁴ = 2156918251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156918237) 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 7 ways as a sum of consecutive naturals, for example, 117413 + ... + 134534.

It is an arithmetic number, because the mean of its divisors is an integer number (308384352).

Almost surely, 2^2156918267 is an apocalyptic number.

2156918267 is a deficient number, since it is larger than the sum of its proper divisors (310156549).

2156918267 is a wasteful number, since it uses less digits than its factorization.

2156918267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253177.

The product of its digits is 362880, while the sum is 47.

The square root of 2156918267 is about 46442.6341522528. The cubic root of 2156918267 is about 1292.0457628597.

The spelling of 2156918267 in words is "two billion, one hundred fifty-six million, nine hundred eighteen thousand, two hundred sixty-seven".