43550725971 has 16 divisors (see below), whose sum is σ = 58336312320. Its totient is φ = 28899562560.

The previous prime is 43550725969. The next prime is 43550725979. The reversal of 43550725971 is 17952705534.

It is not a de Polignac number, because 43550725971 - 2¹ = 43550725969 is a prime.

It is a super-2 number, since 2×43550725971² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43550725971.

It is not an unprimeable number, because it can be changed into a prime (43550725979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529490 + ... + 2546648.

It is an arithmetic number, because the mean of its divisors is an integer number (3646019520).

Almost surely, 2^43550725971 is an apocalyptic number.

43550725971 is a deficient number, since it is larger than the sum of its proper divisors (14785586349).

43550725971 is a wasteful number, since it uses less digits than its factorization.

43550725971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21026.

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 43550725971 in words is "forty-three billion, five hundred fifty million, seven hundred twenty-five thousand, nine hundred seventy-one".