320115511 has 2 divisors, whose sum is σ = 320115512. Its totient is φ = 320115510.

The previous prime is 320115503. The next prime is 320115529. The reversal of 320115511 is 115511023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320115511 - 2³ = 320115503 is a prime.

It is a super-2 number, since 2×320115511² = 204947880765582242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320115571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160057755 + 160057756.

It is an arithmetic number, because the mean of its divisors is an integer number (160057756).

Almost surely, 2^320115511 is an apocalyptic number.

320115511 is a deficient number, since it is larger than the sum of its proper divisors (1).

320115511 is an equidigital number, since it uses as much as digits as its factorization.

320115511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 320115511 is about 17891.7721592915. The cubic root of 320115511 is about 684.0726691998.

Adding to 320115511 its reverse (115511023), we get a palindrome (435626534).

The spelling of 320115511 in words is "three hundred twenty million, one hundred fifteen thousand, five hundred eleven".