2157188015 has 8 divisors (see below), whose sum is σ = 2599931040. Its totient is φ = 1718213472.

The previous prime is 2157188003. The next prime is 2157188017. The reversal of 2157188015 is 5108817512.

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 2157188015 - 2¹⁸ = 2156925871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2157188015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157188017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 940859 + ... + 943148.

It is an arithmetic number, because the mean of its divisors is an integer number (324991380).

Almost surely, 2^2157188015 is an apocalyptic number.

2157188015 is a deficient number, since it is larger than the sum of its proper divisors (442743025).

2157188015 is a wasteful number, since it uses less digits than its factorization.

2157188015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884241.

The product of its (nonzero) digits is 22400, while the sum is 38.

The square root of 2157188015 is about 46445.5381603013. The cubic root of 2157188015 is about 1292.0996224546.

The spelling of 2157188015 in words is "two billion, one hundred fifty-seven million, one hundred eighty-eight thousand, fifteen".