312532021 has 2 divisors, whose sum is σ = 312532022. Its totient is φ = 312532020.

The previous prime is 312531991. The next prime is 312532069. The reversal of 312532021 is 120235213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187964100 + 124567921 = 13710^2 + 11161^2 .

It is a cyclic number.

It is not a de Polignac number, because 312532021 - 2⁹ = 312531509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312532021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312532091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156266010 + 156266011.

It is an arithmetic number, because the mean of its divisors is an integer number (156266011).

Almost surely, 2^312532021 is an apocalyptic number.

It is an amenable number.

312532021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312532021 is an equidigital number, since it uses as much as digits as its factorization.

312532021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 312532021 is about 17678.5751971136. The cubic root of 312532021 is about 678.6275815882.

Adding to 312532021 its reverse (120235213), we get a palindrome (432767234).

The spelling of 312532021 in words is "three hundred twelve million, five hundred thirty-two thousand, twenty-one".