312403143424420 has 24 divisors (see below), whose sum is σ = 673777590414264. Its totient is φ = 121583926089216.

The previous prime is 312403143424399. The next prime is 312403143424433. The reversal of 312403143424420 is 24424341304213.

It can be written as a sum of positive squares in 4 ways, for example, as 186333856973056 + 126069286451364 = 13650416^2 + 11228058^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 312403143424420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211083204277 + ... + 211083205756.

It is an arithmetic number, because the mean of its divisors is an integer number (28074066267261).

Almost surely, 2^{312403143424420} is an apocalyptic number.

It is an amenable number.

312403143424420 is an abundant number, since it is smaller than the sum of its proper divisors (361374446989844).

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

312403143424420 is a wasteful number, since it uses less digits than its factorization.

312403143424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422166410079 (or 422166410077 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 312403143424420 its reverse (24424341304213), we get a palindrome (336827484728633).

The spelling of 312403143424420 in words is "three hundred twelve trillion, four hundred three billion, one hundred forty-three million, four hundred twenty-four thousand, four hundred twenty".