2156067221587 has 8 divisors (see below), whose sum is σ = 2204944011504. Its totient is φ = 2107713178368.

The previous prime is 2156067221569. The next prime is 2156067221593. The reversal of 2156067221587 is 7851227606512.

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 2156067221587 - 2²³ = 2156058832979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156067222587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130678333 + ... + 130694830.

It is an arithmetic number, because the mean of its divisors is an integer number (275618001438).

Almost surely, 2^{2156067221587} is an apocalyptic number.

2156067221587 is a deficient number, since it is larger than the sum of its proper divisors (48876789917).

2156067221587 is a wasteful number, since it uses less digits than its factorization.

2156067221587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261373349.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 2156067221587 in words is "two trillion, one hundred fifty-six billion, sixty-seven million, two hundred twenty-one thousand, five hundred eighty-seven".