351231315440 has 40 divisors (see below), whose sum is σ = 817228438080. Its totient is φ = 140386611456.

The previous prime is 351231315371. The next prime is 351231315521. The reversal of 351231315440 is 44513132153.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 351231315397 and 351231315406.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1548095 + ... + 1760414.

It is an arithmetic number, because the mean of its divisors is an integer number (20430710952).

Almost surely, 2^351231315440 is an apocalyptic number.

It is an amenable number.

351231315440 is an abundant number, since it is smaller than the sum of its proper divisors (465997122640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

351231315440 is a wasteful number, since it uses less digits than its factorization.

351231315440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309849 (or 3309843 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 351231315440 its reverse (44513132153), we get a palindrome (395744447593).

The spelling of 351231315440 in words is "three hundred fifty-one billion, two hundred thirty-one million, three hundred fifteen thousand, four hundred forty".