313121040442442 has 8 divisors (see below), whose sum is σ = 472276486413732. Its totient is φ = 155695544971200.

The previous prime is 313121040442429. The next prime is 313121040442537. The reversal of 313121040442442 is 244244040121313.

It can be written as a sum of positive squares in 2 ways, for example, as 312288309365761 + 832731076681 = 17671681^2 + 912541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×313121040442442² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432487624559 + ... + 432487625282.

Almost surely, 2^{313121040442442} is an apocalyptic number.

313121040442442 is a deficient number, since it is larger than the sum of its proper divisors (159155445971290).

313121040442442 is a wasteful number, since it uses less digits than its factorization.

313121040442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864975250024.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 313121040442442 its reverse (244244040121313), we get a palindrome (557365080563755).

The spelling of 313121040442442 in words is "three hundred thirteen trillion, one hundred twenty-one billion, forty million, four hundred forty-two thousand, four hundred forty-two".