43140403457 has 2 divisors, whose sum is σ = 43140403458. Its totient is φ = 43140403456.

The previous prime is 43140403429. The next prime is 43140403459. The reversal of 43140403457 is 75430404134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34909559281 + 8230844176 = 186841^2 + 90724^2 .

It is a cyclic number.

It is not a de Polignac number, because 43140403457 - 2¹² = 43140399361 is a prime.

It is a super-2 number, since 2×43140403457² (a number of 22 digits) contains 22 as substring.

Together with 43140403459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43140403459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21570201728 + 21570201729.

It is an arithmetic number, because the mean of its divisors is an integer number (21570201729).

Almost surely, 2^43140403457 is an apocalyptic number.

It is an amenable number.

43140403457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43140403457 is an equidigital number, since it uses as much as digits as its factorization.

43140403457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 35.

The spelling of 43140403457 in words is "forty-three billion, one hundred forty million, four hundred three thousand, four hundred fifty-seven".