2561600215 has 32 divisors (see below), whose sum is σ = 3220918272. Its totient is φ = 1953504000.

The previous prime is 2561600203. The next prime is 2561600231. The reversal of 2561600215 is 5120061652.

It is not a de Polignac number, because 2561600215 - 2¹¹ = 2561598167 is a prime.

It is a super-2 number, since 2×2561600215² = 13123591322976092450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4485880 + ... + 4486450.

It is an arithmetic number, because the mean of its divisors is an integer number (100653696).

Almost surely, 2^2561600215 is an apocalyptic number.

2561600215 is a deficient number, since it is larger than the sum of its proper divisors (659318057).

2561600215 is a wasteful number, since it uses less digits than its factorization.

2561600215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 2561600215 is about 50612.2536052288. The cubic root of 2561600215 is about 1368.2657322593.

Adding to 2561600215 its reverse (5120061652), we get a palindrome (7681661867).

The spelling of 2561600215 in words is "two billion, five hundred sixty-one million, six hundred thousand, two hundred fifteen".