43223053621 has 16 divisors (see below), whose sum is σ = 49679884800. Its totient is φ = 37191279600.

The previous prime is 43223053609. The next prime is 43223053631. The reversal of 43223053621 is 12635032234.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43223053621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43223053631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133240 + ... + 322798.

It is an arithmetic number, because the mean of its divisors is an integer number (3104992800).

Almost surely, 2^43223053621 is an apocalyptic number.

It is an amenable number.

43223053621 is a deficient number, since it is larger than the sum of its proper divisors (6456831179).

43223053621 is a wasteful number, since it uses less digits than its factorization.

43223053621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190680.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 43223053621 its reverse (12635032234), we get a palindrome (55858085855).

The spelling of 43223053621 in words is "forty-three billion, two hundred twenty-three million, fifty-three thousand, six hundred twenty-one".