431203118261 has 2 divisors, whose sum is σ = 431203118262. Its totient is φ = 431203118260.

The previous prime is 431203118251. The next prime is 431203118293. The reversal of 431203118261 is 162811302134.

It is an a-pointer prime, because the next prime (431203118293) can be obtained adding 431203118261 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308573584036 + 122629534225 = 555494^2 + 350185^2 .

It is a cyclic number.

It is not a de Polignac number, because 431203118261 - 2³⁰ = 430129376437 is a prime.

It is a super-2 number, since 2×431203118261² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431203118231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215601559130 + 215601559131.

It is an arithmetic number, because the mean of its divisors is an integer number (215601559131).

Almost surely, 2^431203118261 is an apocalyptic number.

It is an amenable number.

431203118261 is a deficient number, since it is larger than the sum of its proper divisors (1).

431203118261 is an equidigital number, since it uses as much as digits as its factorization.

431203118261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 431203118261 in words is "four hundred thirty-one billion, two hundred three million, one hundred eighteen thousand, two hundred sixty-one".