315561430631240 has 16 divisors (see below), whose sum is σ = 710013218920380. Its totient is φ = 126224572252480.

The previous prime is 315561430631221. The next prime is 315561430631243. The reversal of 315561430631240 is 42136034165513.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 269816038462084 + 45745392169156 = 16426078^2 + 6763534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 315561430631191 and 315561430631200.

It is not an unprimeable number, because it can be changed into a prime (315561430631243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3944517882851 + ... + 3944517882930.

Almost surely, 2^{315561430631240} is an apocalyptic number.

It is an amenable number.

315561430631240 is an abundant number, since it is smaller than the sum of its proper divisors (394451788289140).

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

315561430631240 is a wasteful number, since it uses less digits than its factorization.

315561430631240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889035765792 (or 7889035765788 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

Adding to 315561430631240 its reverse (42136034165513), we get a palindrome (357697464796753).

The spelling of 315561430631240 in words is "three hundred fifteen trillion, five hundred sixty-one billion, four hundred thirty million, six hundred thirty-one thousand, two hundred forty".