42631320331 has 4 divisors (see below), whose sum is σ = 42631734312. Its totient is φ = 42630906352.

The previous prime is 42631320323. The next prime is 42631320349. The reversal of 42631320331 is 13302313624.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42631320331 - 2³ = 42631320323 is a prime.

It is a super-2 number, since 2×42631320331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42631320331.

It is not an unprimeable number, because it can be changed into a prime (42631320031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81576 + ... + 303178.

It is an arithmetic number, because the mean of its divisors is an integer number (10657933578).

Almost surely, 2^42631320331 is an apocalyptic number.

42631320331 is a deficient number, since it is larger than the sum of its proper divisors (413981).

42631320331 is a wasteful number, since it uses less digits than its factorization.

42631320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413980.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 42631320331 its reverse (13302313624), we get a palindrome (55933633955).

It can be divided in two parts, 426313 and 20331, that added together give a palindrome (446644).

The spelling of 42631320331 in words is "forty-two billion, six hundred thirty-one million, three hundred twenty thousand, three hundred thirty-one".