431221300397 has 2 divisors, whose sum is σ = 431221300398. Its totient is φ = 431221300396.

The previous prime is 431221300387. The next prime is 431221300427. The reversal of 431221300397 is 793003122134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381307485001 + 49913815396 = 617501^2 + 223414^2 .

It is a cyclic number.

It is not a de Polignac number, because 431221300397 - 2⁴ = 431221300381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431221300327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215610650198 + 215610650199.

It is an arithmetic number, because the mean of its divisors is an integer number (215610650199).

Almost surely, 2^431221300397 is an apocalyptic number.

It is an amenable number.

431221300397 is a deficient number, since it is larger than the sum of its proper divisors (1).

431221300397 is an equidigital number, since it uses as much as digits as its factorization.

431221300397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 431221300397 in words is "four hundred thirty-one billion, two hundred twenty-one million, three hundred thousand, three hundred ninety-seven".