1323172511 has 2 divisors, whose sum is σ = 1323172512. Its totient is φ = 1323172510.

The previous prime is 1323172463. The next prime is 1323172537. The reversal of 1323172511 is 1152713231.

It is an a-pointer prime, because the next prime (1323172537) can be obtained adding 1323172511 to its sum of digits (26).

It is a strong prime.

It is an emirp because it is prime and its reverse (1152713231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323172511 - 2⁶ = 1323172447 is a prime.

It is a super-3 number, since 3×1323172511³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323172561) 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, 661586255 + 661586256.

It is an arithmetic number, because the mean of its divisors is an integer number (661586256).

Almost surely, 2^1323172511 is an apocalyptic number.

1323172511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323172511 is an equidigital number, since it uses as much as digits as its factorization.

1323172511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 26.

The square root of 1323172511 is about 36375.4382928921. The cubic root of 1323172511 is about 1097.8394260115.

Adding to 1323172511 its reverse (1152713231), we get a palindrome (2475885742).

The spelling of 1323172511 in words is "one billion, three hundred twenty-three million, one hundred seventy-two thousand, five hundred eleven".