312150313521 has 32 divisors (see below), whose sum is σ = 482662333440. Its totient is φ = 199193904000.

The previous prime is 312150313487. The next prime is 312150313547. The reversal of 312150313521 is 125313051213.

312150313521 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 503 + 135 + 21 = 666.

It is not a de Polignac number, because 312150313521 - 2⁹ = 312150313009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (312150313021) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2601505 + ... + 2718846.

It is an arithmetic number, because the mean of its divisors is an integer number (15083197920).

Almost surely, 2^312150313521 is an apocalyptic number.

It is an amenable number.

312150313521 is a deficient number, since it is larger than the sum of its proper divisors (170512019919).

312150313521 is a wasteful number, since it uses less digits than its factorization.

312150313521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5320454 (or 5320448 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 312150313521 its reverse (125313051213), we get a palindrome (437463364734).

The spelling of 312150313521 in words is "three hundred twelve billion, one hundred fifty million, three hundred thirteen thousand, five hundred twenty-one".