4000215321 has 16 divisors (see below), whose sum is σ = 5929813120. Its totient is φ = 2665204560.

The previous prime is 4000215319. The next prime is 4000215337. The reversal of 4000215321 is 1235120004.

It is not a de Polignac number, because 4000215321 - 2¹ = 4000215319 is a prime.

It is a super-2 number, since 2×4000215321² = 32003445228726266082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000215294 and 4000215303.

It is not an unprimeable number, because it can be changed into a prime (4000215371) 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, 1956 + ... + 89466.

It is an arithmetic number, because the mean of its divisors is an integer number (370613320).

Almost surely, 2^4000215321 is an apocalyptic number.

It is an amenable number.

4000215321 is a deficient number, since it is larger than the sum of its proper divisors (1929597799).

4000215321 is a wasteful number, since it uses less digits than its factorization.

4000215321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89213 (or 89207 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 4000215321 is about 63247.2554424301. The cubic root of 4000215321 is about 1587.4295348556.

Adding to 4000215321 its reverse (1235120004), we get a palindrome (5235335325).

The spelling of 4000215321 in words is "four billion, two hundred fifteen thousand, three hundred twenty-one".