43145257069 has 2 divisors, whose sum is σ = 43145257070. Its totient is φ = 43145257068.

The previous prime is 43145257061. The next prime is 43145257091. The reversal of 43145257069 is 96075254134.

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., 41448888100 + 1696368969 = 203590^2 + 41187^2 .

It is a cyclic number.

It is not a de Polignac number, because 43145257069 - 2³ = 43145257061 is a prime.

It is a super-2 number, since 2×43145257069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43145257061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21572628534 + 21572628535.

It is an arithmetic number, because the mean of its divisors is an integer number (21572628535).

Almost surely, 2^43145257069 is an apocalyptic number.

It is an amenable number.

43145257069 is a deficient number, since it is larger than the sum of its proper divisors (1).

43145257069 is an equidigital number, since it uses as much as digits as its factorization.

43145257069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 43145257069 in words is "forty-three billion, one hundred forty-five million, two hundred fifty-seven thousand, sixty-nine".