31443203404409 has 2 divisors, whose sum is σ = 31443203404410. Its totient is φ = 31443203404408.

The previous prime is 31443203404381. The next prime is 31443203404427. The reversal of 31443203404409 is 90440430234413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30377425911184 + 1065777493225 = 5511572^2 + 1032365^2 .

It is a cyclic number.

It is not a de Polignac number, because 31443203404409 - 2⁸ = 31443203404153 is a prime.

It is not a weakly prime, because it can be changed into another prime (31443203404499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721601702204 + 15721601702205.

It is an arithmetic number, because the mean of its divisors is an integer number (15721601702205).

Almost surely, 2^{31443203404409} is an apocalyptic number.

It is an amenable number.

31443203404409 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443203404409 is an equidigital number, since it uses as much as digits as its factorization.

31443203404409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 31443203404409 in words is "thirty-one trillion, four hundred forty-three billion, two hundred three million, four hundred four thousand, four hundred nine".