43406254057 has 2 divisors, whose sum is σ = 43406254058. Its totient is φ = 43406254056.

The previous prime is 43406254007. The next prime is 43406254109. The reversal of 43406254057 is 75045260434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43405138921 + 1115136 = 208339^2 + 1056^2 .

It is a cyclic number.

It is not a de Polignac number, because 43406254057 - 2¹⁵ = 43406221289 is a prime.

It is not a weakly prime, because it can be changed into another prime (43406254007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21703127028 + 21703127029.

It is an arithmetic number, because the mean of its divisors is an integer number (21703127029).

Almost surely, 2^43406254057 is an apocalyptic number.

It is an amenable number.

43406254057 is a deficient number, since it is larger than the sum of its proper divisors (1).

43406254057 is an equidigital number, since it uses as much as digits as its factorization.

43406254057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 40.

The spelling of 43406254057 in words is "forty-three billion, four hundred six million, two hundred fifty-four thousand, fifty-seven".