2158787215 has 8 divisors (see below), whose sum is σ = 2789817408. Its totient is φ = 1594181280.

The previous prime is 2158787203. The next prime is 2158787219. The reversal of 2158787215 is 5127878512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2158787215 - 2⁹ = 2158786703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158787219) 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, 16605991 + ... + 16606120.

It is an arithmetic number, because the mean of its divisors is an integer number (348727176).

Almost surely, 2^2158787215 is an apocalyptic number.

2158787215 is a deficient number, since it is larger than the sum of its proper divisors (631030193).

2158787215 is a wasteful number, since it uses less digits than its factorization.

2158787215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33212129.

The product of its digits is 313600, while the sum is 46.

The square root of 2158787215 is about 46462.7508333288. The cubic root of 2158787215 is about 1292.4188366814.

The spelling of 2158787215 in words is "two billion, one hundred fifty-eight million, seven hundred eighty-seven thousand, two hundred fifteen".