2145272369 has 2 divisors, whose sum is σ = 2145272370. Its totient is φ = 2145272368.

The previous prime is 2145272333. The next prime is 2145272383. The reversal of 2145272369 is 9632725412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1261102144 + 884170225 = 35512^2 + 29735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145272369 is a prime.

It is a super-2 number, since 2×2145272369² = 9204387074389744322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2145272329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072636184 + 1072636185.

It is an arithmetic number, because the mean of its divisors is an integer number (1072636185).

Almost surely, 2^2145272369 is an apocalyptic number.

It is an amenable number.

2145272369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145272369 is an equidigital number, since it uses as much as digits as its factorization.

2145272369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 2145272369 is about 46317.0850658804. The cubic root of 2145272369 is about 1289.7161743620.

The spelling of 2145272369 in words is "two billion, one hundred forty-five million, two hundred seventy-two thousand, three hundred sixty-nine".