2215211304 has 64 divisors (see below), whose sum is σ = 5692357440. Its totient is φ = 717949440.

The previous prime is 2215211303. The next prime is 2215211357. The reversal of 2215211304 is 4031125122.

It is a super-2 number, since 2×2215211304² = 9814322242738760832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2215211303) 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, 298422 + ... + 305754.

It is an arithmetic number, because the mean of its divisors is an integer number (88943085).

Almost surely, 2^2215211304 is an apocalyptic number.

2215211304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2215211304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2846178720).

2215211304 is an abundant number, since it is smaller than the sum of its proper divisors (3477146136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2215211304 is a wasteful number, since it uses less digits than its factorization.

2215211304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690 (or 7686 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2215211304 is about 47066.0313177136. The cubic root of 2215211304 is about 1303.5820938052.

Adding to 2215211304 its reverse (4031125122), we get a palindrome (6246336426).

The spelling of 2215211304 in words is "two billion, two hundred fifteen million, two hundred eleven thousand, three hundred four".