320231531261542 has 16 divisors (see below), whose sum is σ = 485379833349600. Its totient is φ = 158445627158848.

The previous prime is 320231531261533. The next prime is 320231531261669. The reversal of 320231531261542 is 245162135132023.

It is a super-2 number, since 2×320231531261542² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320231531261495 and 320231531261504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843333042 + ... + 1843506757.

It is an arithmetic number, because the mean of its divisors is an integer number (30336239584350).

Almost surely, 2^{320231531261542} is an apocalyptic number.

320231531261542 is a deficient number, since it is larger than the sum of its proper divisors (165148302088058).

320231531261542 is a wasteful number, since it uses less digits than its factorization.

320231531261542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686840255.

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 320231531261542 its reverse (245162135132023), we get a palindrome (565393666393565).

The spelling of 320231531261542 in words is "three hundred twenty trillion, two hundred thirty-one billion, five hundred thirty-one million, two hundred sixty-one thousand, five hundred forty-two".