312520430242 has 8 divisors (see below), whose sum is σ = 468819395100. Its totient is φ = 156247298544.

The previous prime is 312520430221. The next prime is 312520430249. The reversal of 312520430242 is 242034025213.

It can be written as a sum of positive squares in 2 ways, for example, as 269767010881 + 42753419361 = 519391^2 + 206769^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 312520430242.

It is not an unprimeable number, because it can be changed into a prime (312520430249) 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 3 ways as a sum of consecutive naturals, for example, 6428017 + ... + 6476452.

Almost surely, 2^312520430242 is an apocalyptic number.

312520430242 is a deficient number, since it is larger than the sum of its proper divisors (156298964858).

312520430242 is a wasteful number, since it uses less digits than its factorization.

312520430242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916580.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 312520430242 its reverse (242034025213), we get a palindrome (554554455455).

The spelling of 312520430242 in words is "three hundred twelve billion, five hundred twenty million, four hundred thirty thousand, two hundred forty-two".