43231541387 has 2 divisors, whose sum is σ = 43231541388. Its totient is φ = 43231541386.

The previous prime is 43231541347. The next prime is 43231541407. The reversal of 43231541387 is 78314513234.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43231541387 - 2⁸ = 43231541131 is a prime.

It is not a weakly prime, because it can be changed into another prime (43231541347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21615770693 + 21615770694.

It is an arithmetic number, because the mean of its divisors is an integer number (21615770694).

Almost surely, 2^43231541387 is an apocalyptic number.

43231541387 is a deficient number, since it is larger than the sum of its proper divisors (1).

43231541387 is an equidigital number, since it uses as much as digits as its factorization.

43231541387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The spelling of 43231541387 in words is "forty-three billion, two hundred thirty-one million, five hundred forty-one thousand, three hundred eighty-seven".