320133215531 has 2 divisors, whose sum is σ = 320133215532. Its totient is φ = 320133215530.

The previous prime is 320133215509. The next prime is 320133215537. The reversal of 320133215531 is 135512331023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320133215531 - 2³⁴ = 302953346347 is a prime.

It is a super-2 number, since 2×320133215531² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320133215494 and 320133215503.

It is not a weakly prime, because it can be changed into another prime (320133215537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160066607765 + 160066607766.

It is an arithmetic number, because the mean of its divisors is an integer number (160066607766).

Almost surely, 2^320133215531 is an apocalyptic number.

320133215531 is a deficient number, since it is larger than the sum of its proper divisors (1).

320133215531 is an equidigital number, since it uses as much as digits as its factorization.

320133215531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

Adding to 320133215531 its reverse (135512331023), we get a palindrome (455645546554).

The spelling of 320133215531 in words is "three hundred twenty billion, one hundred thirty-three million, two hundred fifteen thousand, five hundred thirty-one".