215889072155 has 16 divisors (see below), whose sum is σ = 274086283680. Its totient is φ = 162790612992.

The previous prime is 215889072151. The next prime is 215889072181. The reversal of 215889072155 is 551270988512.

It is a cyclic number.

It is not a de Polignac number, because 215889072155 - 2² = 215889072151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215889072097 and 215889072106.

It is not an unprimeable number, because it can be changed into a prime (215889072151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5749094 + ... + 5786523.

It is an arithmetic number, because the mean of its divisors is an integer number (17130392730).

Almost surely, 2^215889072155 is an apocalyptic number.

215889072155 is a deficient number, since it is larger than the sum of its proper divisors (58197211525).

215889072155 is a wasteful number, since it uses less digits than its factorization.

215889072155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11535838.

The product of its (nonzero) digits is 2016000, while the sum is 53.

The spelling of 215889072155 in words is "two hundred fifteen billion, eight hundred eighty-nine million, seventy-two thousand, one hundred fifty-five".