43431401023 has 2 divisors, whose sum is σ = 43431401024. Its totient is φ = 43431401022.

The previous prime is 43431401021. The next prime is 43431401059. The reversal of 43431401023 is 32010413434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43431401023 - 2¹ = 43431401021 is a prime.

Together with 43431401021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43431401021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715700511 + 21715700512.

It is an arithmetic number, because the mean of its divisors is an integer number (21715700512).

Almost surely, 2^43431401023 is an apocalyptic number.

43431401023 is a deficient number, since it is larger than the sum of its proper divisors (1).

43431401023 is an equidigital number, since it uses as much as digits as its factorization.

43431401023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 43431401023 its reverse (32010413434), we get a palindrome (75441814457).

The spelling of 43431401023 in words is "forty-three billion, four hundred thirty-one million, four hundred one thousand, twenty-three".