43157573 has 4 divisors (see below), whose sum is σ = 43432620. Its totient is φ = 42882528.

The previous prime is 43157567. The next prime is 43157579. The reversal of 43157573 is 37575134.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (43157567) and next prime (43157579).

It can be written as a sum of positive squares in 2 ways, for example, as 28281124 + 14876449 = 5318^2 + 3857^2 .

It is a cyclic number.

It is not a de Polignac number, because 43157573 - 2¹⁰ = 43156549 is a prime.

It is a super-2 number, since 2×43157573² = 3725152214500658, 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 (43157579) 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, 137288 + ... + 137601.

It is an arithmetic number, because the mean of its divisors is an integer number (10858155).

Almost surely, 2^43157573 is an apocalyptic number.

It is an amenable number.

43157573 is a deficient number, since it is larger than the sum of its proper divisors (275047).

43157573 is a wasteful number, since it uses less digits than its factorization.

43157573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275046.

The product of its digits is 44100, while the sum is 35.

The square root of 43157573 is about 6569.4423659851. The cubic root of 43157573 is about 350.7672230899.

The spelling of 43157573 in words is "forty-three million, one hundred fifty-seven thousand, five hundred seventy-three".