315221120440 has 32 divisors (see below), whose sum is σ = 732126476160. Its totient is φ = 122021078400.

The previous prime is 315221120387. The next prime is 315221120441. The reversal of 315221120440 is 44021122513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315221120441) 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 7 ways as a sum of consecutive naturals, for example, 127104051 + ... + 127106530.

It is an arithmetic number, because the mean of its divisors is an integer number (22878952380).

Almost surely, 2^315221120440 is an apocalyptic number.

It is an amenable number.

315221120440 is an abundant number, since it is smaller than the sum of its proper divisors (416905355720).

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

315221120440 is a wasteful number, since it uses less digits than its factorization.

315221120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254210623 (or 254210619 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 315221120440 its reverse (44021122513), we get a palindrome (359242242953).

The spelling of 315221120440 in words is "three hundred fifteen billion, two hundred twenty-one million, one hundred twenty thousand, four hundred forty".