43075509421 has 24 divisors (see below), whose sum is σ = 51362216640. Its totient is φ = 35999006400.

The previous prime is 43075509413. The next prime is 43075509431. The reversal of 43075509421 is 12490557034.

It is a happy number.

It is not a de Polignac number, because 43075509421 - 2³ = 43075509413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43075509401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3769206 + ... + 3780616.

It is an arithmetic number, because the mean of its divisors is an integer number (2140092360).

Almost surely, 2^43075509421 is an apocalyptic number.

43075509421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43075509421 is a deficient number, since it is larger than the sum of its proper divisors (8286707219).

43075509421 is a wasteful number, since it uses less digits than its factorization.

43075509421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13345 (or 13338 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 43075509421 in words is "forty-three billion, seventy-five million, five hundred nine thousand, four hundred twenty-one".