321407273512 has 16 divisors (see below), whose sum is σ = 648995456340. Its totient is φ = 148341818496.

The previous prime is 321407273501. The next prime is 321407273521. The reversal of 321407273512 is 215372704123.

It can be written as a sum of positive squares in 2 ways, for example, as 280046289636 + 41360983876 = 529194^2 + 203374^2 .

It is an unprimeable number.

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, 1545227173 + ... + 1545227380.

Almost surely, 2^321407273512 is an apocalyptic number.

It is an amenable number.

321407273512 is an abundant number, since it is smaller than the sum of its proper divisors (327588182828).

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

321407273512 is a wasteful number, since it uses less digits than its factorization.

321407273512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090454572 (or 3090454568 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

Adding to 321407273512 its reverse (215372704123), we get a palindrome (536779977635).

The spelling of 321407273512 in words is "three hundred twenty-one billion, four hundred seven million, two hundred seventy-three thousand, five hundred twelve".