352431739971821 has 2 divisors, whose sum is σ = 352431739971822. Its totient is φ = 352431739971820.

The previous prime is 352431739971811. The next prime is 352431739971847. The reversal of 352431739971821 is 128179937134253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351143937157225 + 1287802814596 = 18738835^2 + 1134814^2 .

It is a cyclic number.

It is not a de Polignac number, because 352431739971821 - 2⁶ = 352431739971757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (352431739971811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176215869985910 + 176215869985911.

It is an arithmetic number, because the mean of its divisors is an integer number (176215869985911).

Almost surely, 2^{352431739971821} is an apocalyptic number.

It is an amenable number.

352431739971821 is a deficient number, since it is larger than the sum of its proper divisors (1).

352431739971821 is an equidigital number, since it uses as much as digits as its factorization.

352431739971821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 65.

The spelling of 352431739971821 in words is "three hundred fifty-two trillion, four hundred thirty-one billion, seven hundred thirty-nine million, nine hundred seventy-one thousand, eight hundred twenty-one".