431304442381 has 2 divisors, whose sum is σ = 431304442382. Its totient is φ = 431304442380.

The previous prime is 431304442307. The next prime is 431304442417. The reversal of 431304442381 is 183244403134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422683319881 + 8621122500 = 650141^2 + 92850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431304442381 is a prime.

It is a super-2 number, since 2×431304442381² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 431304442381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431304412381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215652221190 + 215652221191.

It is an arithmetic number, because the mean of its divisors is an integer number (215652221191).

Almost surely, 2^431304442381 is an apocalyptic number.

It is an amenable number.

431304442381 is a deficient number, since it is larger than the sum of its proper divisors (1).

431304442381 is an equidigital number, since it uses as much as digits as its factorization.

431304442381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 431304442381 in words is "four hundred thirty-one billion, three hundred four million, four hundred forty-two thousand, three hundred eighty-one".