320553100012531 has 16 divisors (see below), whose sum is σ = 325431744035328. Its totient is φ = 315707986048000.

The previous prime is 320553100012501. The next prime is 320553100012567. The reversal of 320553100012531 is 135210001355023.

It is a cyclic number.

It is not a de Polignac number, because 320553100012531 - 2³¹ = 320550952528883 is a prime.

It is a super-2 number, since 2×320553100012531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320553100012493 and 320553100012502.

It is not an unprimeable number, because it can be changed into a prime (320553100012501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677900175 + ... + 678372871.

It is an arithmetic number, because the mean of its divisors is an integer number (20339484002208).

Almost surely, 2^{320553100012531} is an apocalyptic number.

320553100012531 is a deficient number, since it is larger than the sum of its proper divisors (4878644022797).

320553100012531 is a wasteful number, since it uses less digits than its factorization.

320553100012531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508142.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 320553100012531 its reverse (135210001355023), we get a palindrome (455763101367554).

The spelling of 320553100012531 in words is "three hundred twenty trillion, five hundred fifty-three billion, one hundred million, twelve thousand, five hundred thirty-one".