43215157 has 2 divisors, whose sum is σ = 43215158. Its totient is φ = 43215156.

The previous prime is 43215131. The next prime is 43215167. The reversal of 43215157 is 75151234.

It is a happy number.

43215157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32364721 + 10850436 = 5689^2 + 3294^2 .

It is a cyclic number.

It is not a de Polignac number, because 43215157 - 2¹¹ = 43213109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43215167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21607578 + 21607579.

It is an arithmetic number, because the mean of its divisors is an integer number (21607579).

Almost surely, 2^43215157 is an apocalyptic number.

It is an amenable number.

43215157 is a deficient number, since it is larger than the sum of its proper divisors (1).

43215157 is an equidigital number, since it uses as much as digits as its factorization.

43215157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 43215157 is about 6573.8236209987. The cubic root of 43215157 is about 350.9231602102.

The spelling of 43215157 in words is "forty-three million, two hundred fifteen thousand, one hundred fifty-seven".