43574353921 has 24 divisors (see below), whose sum is σ = 52910639424. Its totient is φ = 35713228320.

The previous prime is 43574353909. The next prime is 43574353943. The reversal of 43574353921 is 12935347534.

It is not a de Polignac number, because 43574353921 - 2⁷ = 43574353793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43574353421) 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, 4788586 + ... + 4797676.

It is an arithmetic number, because the mean of its divisors is an integer number (2204609976).

Almost surely, 2^43574353921 is an apocalyptic number.

It is an amenable number.

43574353921 is a deficient number, since it is larger than the sum of its proper divisors (9336285503).

43574353921 is a wasteful number, since it uses less digits than its factorization.

43574353921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381 (or 13374 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 46.

The spelling of 43574353921 in words is "forty-three billion, five hundred seventy-four million, three hundred fifty-three thousand, nine hundred twenty-one".