43420140031511 has 2 divisors, whose sum is σ = 43420140031512. Its totient is φ = 43420140031510.

The previous prime is 43420140031493. The next prime is 43420140031517. The reversal of 43420140031511 is 11513004102434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43420140031511 - 2³⁸ = 43145262124567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43420140031517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710070015755 + 21710070015756.

It is an arithmetic number, because the mean of its divisors is an integer number (21710070015756).

Almost surely, 2^{43420140031511} is an apocalyptic number.

43420140031511 is a deficient number, since it is larger than the sum of its proper divisors (1).

43420140031511 is an equidigital number, since it uses as much as digits as its factorization.

43420140031511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 43420140031511 its reverse (11513004102434), we get a palindrome (54933144133945).

The spelling of 43420140031511 in words is "forty-three trillion, four hundred twenty billion, one hundred forty million, thirty-one thousand, five hundred eleven".