2156609515 has 8 divisors (see below), whose sum is σ = 2591935200. Its totient is φ = 1722618432.

The previous prime is 2156609453. The next prime is 2156609531. The reversal of 2156609515 is 5159066512.

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 2156609515 - 2³¹ = 9125867 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 330090 + ... + 336559.

It is an arithmetic number, because the mean of its divisors is an integer number (323991900).

Almost surely, 2^2156609515 is an apocalyptic number.

2156609515 is a deficient number, since it is larger than the sum of its proper divisors (435325685).

2156609515 is an equidigital number, since it uses as much as digits as its factorization.

2156609515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667301.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 2156609515 is about 46439.3100185608. The cubic root of 2156609515 is about 1291.9841099673.

The spelling of 2156609515 in words is "two billion, one hundred fifty-six million, six hundred nine thousand, five hundred fifteen".