321511430345 has 32 divisors (see below), whose sum is σ = 443604086016. Its totient is φ = 219129235200.

The previous prime is 321511430341. The next prime is 321511430393. The reversal of 321511430345 is 543034115123.

It is not a de Polignac number, because 321511430345 - 2² = 321511430341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321511430341) 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, 12727067 + ... + 12752303.

It is an arithmetic number, because the mean of its divisors is an integer number (13862627688).

Almost surely, 2^321511430345 is an apocalyptic number.

321511430345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321511430345 is a deficient number, since it is larger than the sum of its proper divisors (122092655671).

321511430345 is a wasteful number, since it uses less digits than its factorization.

321511430345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27441.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 321511430345 its reverse (543034115123), we get a palindrome (864545545468).

The spelling of 321511430345 in words is "three hundred twenty-one billion, five hundred eleven million, four hundred thirty thousand, three hundred forty-five".