43142445391 has 2 divisors, whose sum is σ = 43142445392. Its totient is φ = 43142445390.

The previous prime is 43142445373. The next prime is 43142445403. The reversal of 43142445391 is 19354424134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43142445391 - 2²⁵ = 43108890959 is a prime.

It is a super-2 number, since 2×43142445391² (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 (43142445331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21571222695 + 21571222696.

It is an arithmetic number, because the mean of its divisors is an integer number (21571222696).

Almost surely, 2^43142445391 is an apocalyptic number.

43142445391 is a deficient number, since it is larger than the sum of its proper divisors (1).

43142445391 is an equidigital number, since it uses as much as digits as its factorization.

43142445391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The spelling of 43142445391 in words is "forty-three billion, one hundred forty-two million, four hundred forty-five thousand, three hundred ninety-one".