43155139 has 2 divisors, whose sum is σ = 43155140. Its totient is φ = 43155138.

The previous prime is 43155109. The next prime is 43155143. The reversal of 43155139 is 93155134.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43155139 - 2⁷ = 43155011 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43155139.

It is not a weakly prime, because it can be changed into another prime (43155109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21577569 + 21577570.

It is an arithmetic number, because the mean of its divisors is an integer number (21577570).

Almost surely, 2^43155139 is an apocalyptic number.

43155139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43155139 is an equidigital number, since it uses as much as digits as its factorization.

43155139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

The square root of 43155139 is about 6569.2571117288. The cubic root of 43155139 is about 350.7606287782.

The spelling of 43155139 in words is "forty-three million, one hundred fifty-five thousand, one hundred thirty-nine".