431796180521 has 2 divisors, whose sum is σ = 431796180522. Its totient is φ = 431796180520.

The previous prime is 431796180479. The next prime is 431796180617. The reversal of 431796180521 is 125081697134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423103415296 + 8692765225 = 650464^2 + 93235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431796180521 is a prime.

It is a super-3 number, since 3×431796180521³ (a number of 36 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (431796183521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215898090260 + 215898090261.

It is an arithmetic number, because the mean of its divisors is an integer number (215898090261).

It is a 1-persistent number, because it is pandigital, but 2⋅431796180521 = 863592361042 is not.

Almost surely, 2^431796180521 is an apocalyptic number.

It is an amenable number.

431796180521 is a deficient number, since it is larger than the sum of its proper divisors (1).

431796180521 is an equidigital number, since it uses as much as digits as its factorization.

431796180521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 431796180521 in words is "four hundred thirty-one billion, seven hundred ninety-six million, one hundred eighty thousand, five hundred twenty-one".