2156241605 has 32 divisors (see below), whose sum is σ = 3091765248. Its totient is φ = 1411502400.

The previous prime is 2156241601. The next prime is 2156241617. The reversal of 2156241605 is 5061426512.

2156241605 = 7832² + 7833² + ... + 7866².

It is not a de Polignac number, because 2156241605 - 2² = 2156241601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156241601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 457310 + ... + 462000.

It is an arithmetic number, because the mean of its divisors is an integer number (96617664).

Almost surely, 2^2156241605 is an apocalyptic number.

It is an amenable number.

2156241605 is a deficient number, since it is larger than the sum of its proper divisors (935523643).

2156241605 is a wasteful number, since it uses less digits than its factorization.

2156241605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2156241605 is about 46435.3486581074. The cubic root of 2156241605 is about 1291.9106364736.

The spelling of 2156241605 in words is "two billion, one hundred fifty-six million, two hundred forty-one thousand, six hundred five".