4444215381 has 6 divisors (see below), whose sum is σ = 6419422230. Its totient is φ = 2962810248.

The previous prime is 4444215379. The next prime is 4444215407. The reversal of 4444215381 is 1835124444.

It can be written as a sum of positive squares in only one way, i.e., 4043815281 + 400400100 = 63591^2 + 20010^2 .

It is not a de Polignac number, because 4444215381 - 2¹ = 4444215379 is a prime.

It is a super-3 number, since 3×4444215381³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444215481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246900846 + ... + 246900863.

It is an arithmetic number, because the mean of its divisors is an integer number (1069903705).

Almost surely, 2^4444215381 is an apocalyptic number.

It is an amenable number.

4444215381 is a deficient number, since it is larger than the sum of its proper divisors (1975206849).

4444215381 is a wasteful number, since it uses less digits than its factorization.

4444215381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493801715 (or 493801712 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 4444215381 is about 66664.9486686970. The cubic root of 4444215381 is about 1644.1131364501.

The spelling of 4444215381 in words is "four billion, four hundred forty-four million, two hundred fifteen thousand, three hundred eighty-one".