43254423137 has 2 divisors, whose sum is σ = 43254423138. Its totient is φ = 43254423136.

The previous prime is 43254423103. The next prime is 43254423193. The reversal of 43254423137 is 73132445234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32339188561 + 10915234576 = 179831^2 + 104476^2 .

It is a cyclic number.

It is not a de Polignac number, because 43254423137 - 2²⁰ = 43253374561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43254423137.

It is not a weakly prime, because it can be changed into another prime (43254423197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21627211568 + 21627211569.

It is an arithmetic number, because the mean of its divisors is an integer number (21627211569).

Almost surely, 2^43254423137 is an apocalyptic number.

It is an amenable number.

43254423137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43254423137 is an equidigital number, since it uses as much as digits as its factorization.

43254423137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 38.

The spelling of 43254423137 in words is "forty-three billion, two hundred fifty-four million, four hundred twenty-three thousand, one hundred thirty-seven".