2155923587 has 4 divisors (see below), whose sum is σ = 2164513176. Its totient is φ = 2147334000.

The previous prime is 2155923577. The next prime is 2155923611. The reversal of 2155923587 is 7853295512.

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 2155923587 - 2¹⁴ = 2155907203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155923547) 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, 4294418 + ... + 4294919.

It is an arithmetic number, because the mean of its divisors is an integer number (541128294).

Almost surely, 2^2155923587 is an apocalyptic number.

2155923587 is a deficient number, since it is larger than the sum of its proper divisors (8589589).

2155923587 is an equidigital number, since it uses as much as digits as its factorization.

2155923587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8589588.

The product of its digits is 756000, while the sum is 47.

The square root of 2155923587 is about 46431.9242224571. The cubic root of 2155923587 is about 1291.8471199308.

The spelling of 2155923587 in words is "two billion, one hundred fifty-five million, nine hundred twenty-three thousand, five hundred eighty-seven".