431099981057 has 2 divisors, whose sum is σ = 431099981058. Its totient is φ = 431099981056.

The previous prime is 431099981041. The next prime is 431099981077. The reversal of 431099981057 is 750189990134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423646076161 + 7453904896 = 650881^2 + 86336^2 .

It is a cyclic number.

It is not a de Polignac number, because 431099981057 - 2⁴ = 431099981041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 431099980993 and 431099981011.

It is not a weakly prime, because it can be changed into another prime (431099981077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215549990528 + 215549990529.

It is an arithmetic number, because the mean of its divisors is an integer number (215549990529).

Almost surely, 2^431099981057 is an apocalyptic number.

It is an amenable number.

431099981057 is a deficient number, since it is larger than the sum of its proper divisors (1).

431099981057 is an equidigital number, since it uses as much as digits as its factorization.

431099981057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 431099981057 in words is "four hundred thirty-one billion, ninety-nine million, nine hundred eighty-one thousand, fifty-seven".