43157449 has 2 divisors, whose sum is σ = 43157450. Its totient is φ = 43157448.

The previous prime is 43157399. The next prime is 43157479. The reversal of 43157449 is 94475134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27751824 + 15405625 = 5268^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 43157449 - 2⁹ = 43156937 is a prime.

It is not a weakly prime, because it can be changed into another prime (43157479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21578724 + 21578725.

It is an arithmetic number, because the mean of its divisors is an integer number (21578725).

Almost surely, 2^43157449 is an apocalyptic number.

It is an amenable number.

43157449 is a deficient number, since it is larger than the sum of its proper divisors (1).

43157449 is an equidigital number, since it uses as much as digits as its factorization.

43157449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 43157449 is about 6569.4329283432. The cubic root of 43157449 is about 350.7668871491.

The spelling of 43157449 in words is "forty-three million, one hundred fifty-seven thousand, four hundred forty-nine".