43181157 has 4 divisors (see below), whose sum is σ = 57574880. Its totient is φ = 28787436.

The previous prime is 43181141. The next prime is 43181197. The reversal of 43181157 is 75118134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 43181157 - 2⁴ = 43181141 is a prime.

It is a super-2 number, since 2×43181157² = 3729224639717298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43181197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7196857 + ... + 7196862.

It is an arithmetic number, because the mean of its divisors is an integer number (14393720).

Almost surely, 2^43181157 is an apocalyptic number.

It is an amenable number.

43181157 is a deficient number, since it is larger than the sum of its proper divisors (14393723).

43181157 is a wasteful number, since it uses less digits than its factorization.

43181157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14393722.

The product of its digits is 3360, while the sum is 30.

The square root of 43181157 is about 6571.2370981422. The cubic root of 43181157 is about 350.8311051791.

The spelling of 43181157 in words is "forty-three million, one hundred eighty-one thousand, one hundred fifty-seven".