352831920721 has 16 divisors (see below), whose sum is σ = 411842059776. Its totient is φ = 295973991936.

The previous prime is 352831920677. The next prime is 352831920733. The reversal of 352831920721 is 127029138253.

It is not a de Polignac number, because 352831920721 - 2¹³ = 352831912529 is a prime.

It is a super-3 number, since 3×352831920721³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (352831920421) 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 15 ways as a sum of consecutive naturals, for example, 8195965 + ... + 8238901.

It is an arithmetic number, because the mean of its divisors is an integer number (25740128736).

Almost surely, 2^352831920721 is an apocalyptic number.

It is an amenable number.

352831920721 is a deficient number, since it is larger than the sum of its proper divisors (59010139055).

352831920721 is a wasteful number, since it uses less digits than its factorization.

352831920721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67968.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 352831920721 in words is "three hundred fifty-two billion, eight hundred thirty-one million, nine hundred twenty thousand, seven hundred twenty-one".