2155444005 has 64 divisors (see below), whose sum is σ = 4150621440. Its totient is φ = 941107200.

The previous prime is 2155444003. The next prime is 2155444009. The reversal of 2155444005 is 5004445512.

It is not a de Polignac number, because 2155444005 - 2¹ = 2155444003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155444003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75691 + ... + 100199.

It is an arithmetic number, because the mean of its divisors is an integer number (64853460).

Almost surely, 2^2155444005 is an apocalyptic number.

It is an amenable number.

2155444005 is a deficient number, since it is larger than the sum of its proper divisors (1995177435).

2155444005 is a wasteful number, since it uses less digits than its factorization.

2155444005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24582.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 2155444005 is about 46426.7595789325. The cubic root of 2155444005 is about 1291.7513230027.

Adding to 2155444005 its reverse (5004445512), we get a palindrome (7159889517).

The spelling of 2155444005 in words is "two billion, one hundred fifty-five million, four hundred forty-four thousand, five".