2145540005 has 16 divisors (see below), whose sum is σ = 2951752320. Its totient is φ = 1466578752.

The previous prime is 2145539987. The next prime is 2145540043. The reversal of 2145540005 is 5000455412.

It is a cyclic number.

It is not a de Polignac number, because 2145540005 - 2⁶ = 2145539941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85595 + ... + 107784.

It is an arithmetic number, because the mean of its divisors is an integer number (184484520).

Almost surely, 2^2145540005 is an apocalyptic number.

It is an amenable number.

2145540005 is a deficient number, since it is larger than the sum of its proper divisors (806212315).

2145540005 is a wasteful number, since it uses less digits than its factorization.

2145540005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193708.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2145540005 is about 46319.9741472294. The cubic root of 2145540005 is about 1289.7698054890.

Adding to 2145540005 its reverse (5000455412), we get a palindrome (7145995417).

The spelling of 2145540005 in words is "two billion, one hundred forty-five million, five hundred forty thousand, five".