2156104771 has 4 divisors (see below), whose sum is σ = 2164303152. Its totient is φ = 2147906392.

The previous prime is 2156104763. The next prime is 2156104807. The reversal of 2156104771 is 1774016512.

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

It is a cyclic number.

It is not a de Polignac number, because 2156104771 - 2³ = 2156104763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156104721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4098796 + ... + 4099321.

It is an arithmetic number, because the mean of its divisors is an integer number (541075788).

Almost surely, 2^2156104771 is an apocalyptic number.

2156104771 is a deficient number, since it is larger than the sum of its proper divisors (8198381).

2156104771 is an equidigital number, since it uses as much as digits as its factorization.

2156104771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198380.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 2156104771 is about 46433.8752528798. The cubic root of 2156104771 is about 1291.8833078974.

The spelling of 2156104771 in words is "two billion, one hundred fifty-six million, one hundred four thousand, seven hundred seventy-one".