43950273221 has 4 divisors (see below), whose sum is σ = 44147359872. Its totient is φ = 43753186572.

The previous prime is 43950273131. The next prime is 43950273233. The reversal of 43950273221 is 12237205934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43950273221 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 (43950273821) 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, 98542991 + ... + 98543436.

It is an arithmetic number, because the mean of its divisors is an integer number (11036839968).

Almost surely, 2^43950273221 is an apocalyptic number.

It is an amenable number.

43950273221 is a deficient number, since it is larger than the sum of its proper divisors (197086651).

43950273221 is a wasteful number, since it uses less digits than its factorization.

43950273221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197086650.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 43950273221 in words is "forty-three billion, nine hundred fifty million, two hundred seventy-three thousand, two hundred twenty-one".