431554051997 has 2 divisors, whose sum is σ = 431554051998. Its totient is φ = 431554051996.

The previous prime is 431554051993. The next prime is 431554052011. The reversal of 431554051997 is 799150455134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 350628595321 + 80925456676 = 592139^2 + 284474^2 .

It is a cyclic number.

It is not a de Polignac number, because 431554051997 - 2² = 431554051993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431554051993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215777025998 + 215777025999.

It is an arithmetic number, because the mean of its divisors is an integer number (215777025999).

Almost surely, 2^431554051997 is an apocalyptic number.

It is an amenable number.

431554051997 is a deficient number, since it is larger than the sum of its proper divisors (1).

431554051997 is an equidigital number, since it uses as much as digits as its factorization.

431554051997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402000, while the sum is 53.

The spelling of 431554051997 in words is "four hundred thirty-one billion, five hundred fifty-four million, fifty-one thousand, nine hundred ninety-seven".