1443402221 has 8 divisors (see below), whose sum is σ = 1532571840. Its totient is φ = 1354706368.

The previous prime is 1443402217. The next prime is 1443402229. The reversal of 1443402221 is 1222043441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1443402221 - 2² = 1443402217 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 (1443402229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112151 + ... + 124356.

It is an arithmetic number, because the mean of its divisors is an integer number (191571480).

Almost surely, 2^1443402221 is an apocalyptic number.

It is an amenable number.

1443402221 is a deficient number, since it is larger than the sum of its proper divisors (89169619).

1443402221 is a wasteful number, since it uses less digits than its factorization.

1443402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236883.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1443402221 is about 37992.1336726433. The cubic root of 1443402221 is about 1130.1318719933.

Adding to 1443402221 its reverse (1222043441), we get a palindrome (2665445662).

The spelling of 1443402221 in words is "one billion, four hundred forty-three million, four hundred two thousand, two hundred twenty-one".