2157936515 has 16 divisors (see below), whose sum is σ = 2961638400. Its totient is φ = 1478636640.

The previous prime is 2157936511. The next prime is 2157936523. The reversal of 2157936515 is 5156397512.

It is not a de Polignac number, because 2157936515 - 2² = 2157936511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157936511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26930 + ... + 71000.

It is an arithmetic number, because the mean of its divisors is an integer number (185102400).

Almost surely, 2^2157936515 is an apocalyptic number.

2157936515 is a deficient number, since it is larger than the sum of its proper divisors (803701885).

2157936515 is a wasteful number, since it uses less digits than its factorization.

2157936515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45482.

The product of its digits is 283500, while the sum is 44.

The square root of 2157936515 is about 46453.5952860486. The cubic root of 2157936515 is about 1292.2490491965.

The spelling of 2157936515 in words is "two billion, one hundred fifty-seven million, nine hundred thirty-six thousand, five hundred fifteen".