1016444221 has 16 divisors (see below), whose sum is σ = 1143467136. Its totient is φ = 896486976.

The previous prime is 1016444201. The next prime is 1016444291. The reversal of 1016444221 is 1224446101.

It is a cyclic number.

It is not a de Polignac number, because 1016444221 - 2⁹ = 1016443709 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 (1016444201) 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, 514191 + ... + 516163.

It is an arithmetic number, because the mean of its divisors is an integer number (71466696).

Almost surely, 2^1016444221 is an apocalyptic number.

It is an amenable number.

1016444221 is a deficient number, since it is larger than the sum of its proper divisors (127022915).

1016444221 is a wasteful number, since it uses less digits than its factorization.

1016444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1016444221 is about 31881.7223656439. The cubic root of 1016444221 is about 1005.4516326929.

The spelling of 1016444221 in words is "one billion, sixteen million, four hundred forty-four thousand, two hundred twenty-one".