4001504221 has 16 divisors (see below), whose sum is σ = 4705843968. Its totient is φ = 3354494400.

The previous prime is 4001504219. The next prime is 4001504233. The reversal of 4001504221 is 1224051004.

It is a cyclic number.

It is not a de Polignac number, because 4001504221 - 2¹ = 4001504219 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 (4001504321) 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, 132300 + ... + 159706.

It is an arithmetic number, because the mean of its divisors is an integer number (294115248).

Almost surely, 2^4001504221 is an apocalyptic number.

It is an amenable number.

4001504221 is a deficient number, since it is larger than the sum of its proper divisors (704339747).

4001504221 is a wasteful number, since it uses less digits than its factorization.

4001504221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28452.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 4001504221 is about 63257.4439967345. The cubic root of 4001504221 is about 1587.6000105303.

Adding to 4001504221 its reverse (1224051004), we get a palindrome (5225555225).

The spelling of 4001504221 in words is "four billion, one million, five hundred four thousand, two hundred twenty-one".