2045131217 has 2 divisors, whose sum is σ = 2045131218. Its totient is φ = 2045131216.

The previous prime is 2045131199. The next prime is 2045131241. The reversal of 2045131217 is 7121315402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1546770241 + 498360976 = 39329^2 + 22324^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045131217 - 2⁸ = 2045130961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2045131117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022565608 + 1022565609.

It is an arithmetic number, because the mean of its divisors is an integer number (1022565609).

Almost surely, 2^2045131217 is an apocalyptic number.

It is an amenable number.

2045131217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045131217 is an equidigital number, since it uses as much as digits as its factorization.

2045131217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2045131217 is about 45223.1270148361. The cubic root of 2045131217 is about 1269.3276075721.

Adding to 2045131217 its reverse (7121315402), we get a palindrome (9166446619).

The spelling of 2045131217 in words is "two billion, forty-five million, one hundred thirty-one thousand, two hundred seventeen".