2157559601 has 4 divisors (see below), whose sum is σ = 2157790272. Its totient is φ = 2157328932.

The previous prime is 2157559589. The next prime is 2157559699. The reversal of 2157559601 is 1069557512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2157559601 - 2¹⁰ = 2157558577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157559501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100685 + ... + 120218.

It is an arithmetic number, because the mean of its divisors is an integer number (539447568).

Almost surely, 2^2157559601 is an apocalyptic number.

It is an amenable number.

2157559601 is a deficient number, since it is larger than the sum of its proper divisors (230671).

2157559601 is an equidigital number, since it uses as much as digits as its factorization.

2157559601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230670.

The product of its (nonzero) digits is 94500, while the sum is 41.

The square root of 2157559601 is about 46449.5382216013. The cubic root of 2157559601 is about 1292.1738083178.

The spelling of 2157559601 in words is "two billion, one hundred fifty-seven million, five hundred fifty-nine thousand, six hundred one".