2145255499 has 2 divisors, whose sum is σ = 2145255500. Its totient is φ = 2145255498.

The previous prime is 2145255493. The next prime is 2145255569. The reversal of 2145255499 is 9945525412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145255499 - 2³ = 2145255491 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145255491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072627749 + 1072627750.

It is an arithmetic number, because the mean of its divisors is an integer number (1072627750).

Almost surely, 2^2145255499 is an apocalyptic number.

2145255499 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145255499 is an equidigital number, since it uses as much as digits as its factorization.

2145255499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 46.

The square root of 2145255499 is about 46316.9029512985. The cubic root of 2145255499 is about 1289.7127936617.

The spelling of 2145255499 in words is "two billion, one hundred forty-five million, two hundred fifty-five thousand, four hundred ninety-nine".