313121344340442 has 32 divisors (see below), whose sum is σ = 683175266726400. Its totient is φ = 94885058009520.

The previous prime is 313121344340417. The next prime is 313121344340477. The reversal of 313121344340442 is 244043443121313.

It is a self number, because there is not a number n which added to its sum of digits gives 313121344340442.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28662753 + ... + 38049915.

It is an arithmetic number, because the mean of its divisors is an integer number (21349227085200).

Almost surely, 2^{313121344340442} is an apocalyptic number.

313121344340442 is an abundant number, since it is smaller than the sum of its proper divisors (370053922385958).

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

313121344340442 is a wasteful number, since it uses less digits than its factorization.

313121344340442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9892578.

The product of its (nonzero) digits is 331776, while the sum is 39.

Adding to 313121344340442 its reverse (244043443121313), we get a palindrome (557164787461755).

The spelling of 313121344340442 in words is "three hundred thirteen trillion, one hundred twenty-one billion, three hundred forty-four million, three hundred forty thousand, four hundred forty-two".