320245511 has 2 divisors, whose sum is σ = 320245512. Its totient is φ = 320245510.

The previous prime is 320245489. The next prime is 320245529. The reversal of 320245511 is 115542023.

It is a strong prime.

It is an emirp because it is prime and its reverse (115542023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320245511 is a prime.

It is a super-2 number, since 2×320245511² = 205114374631302242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320245561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160122755 + 160122756.

It is an arithmetic number, because the mean of its divisors is an integer number (160122756).

Almost surely, 2^320245511 is an apocalyptic number.

320245511 is a deficient number, since it is larger than the sum of its proper divisors (1).

320245511 is an equidigital number, since it uses as much as digits as its factorization.

320245511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 320245511 is about 17895.4047453529. The cubic root of 320245511 is about 684.1652580815.

Adding to 320245511 its reverse (115542023), we get a palindrome (435787534).

The spelling of 320245511 in words is "three hundred twenty million, two hundred forty-five thousand, five hundred eleven".