312051532531 has 4 divisors (see below), whose sum is σ = 314813050632. Its totient is φ = 309290014432.

The previous prime is 312051532501. The next prime is 312051532537. The reversal of 312051532531 is 135235150213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312051532531 - 2²⁷ = 311917314803 is a prime.

It is a super-2 number, since 2×312051532531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312051532493 and 312051532502.

It is not an unprimeable number, because it can be changed into a prime (312051532537) 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 3 ways as a sum of consecutive naturals, for example, 1380758881 + ... + 1380759106.

It is an arithmetic number, because the mean of its divisors is an integer number (78703262658).

Almost surely, 2^312051532531 is an apocalyptic number.

312051532531 is a deficient number, since it is larger than the sum of its proper divisors (2761518101).

312051532531 is a wasteful number, since it uses less digits than its factorization.

312051532531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761518100.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 312051532531 its reverse (135235150213), we get a palindrome (447286682744).

The spelling of 312051532531 in words is "three hundred twelve billion, fifty-one million, five hundred thirty-two thousand, five hundred thirty-one".