2215453221 has 16 divisors (see below), whose sum is σ = 3290353920. Its totient is φ = 1473278400.

The previous prime is 2215453211. The next prime is 2215453271. The reversal of 2215453221 is 1223545122.

It is not a de Polignac number, because 2215453221 - 2⁶ = 2215453157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215453211) 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, 91485 + ... + 113138.

It is an arithmetic number, because the mean of its divisors is an integer number (205647120).

Almost surely, 2^2215453221 is an apocalyptic number.

It is an amenable number.

2215453221 is a deficient number, since it is larger than the sum of its proper divisors (1074900699).

2215453221 is a wasteful number, since it uses less digits than its factorization.

2215453221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205033 (or 205027 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2215453221 is about 47068.6012220461. The cubic root of 2215453221 is about 1303.6295455900.

Adding to 2215453221 its reverse (1223545122), we get a palindrome (3438998343).

The spelling of 2215453221 in words is "two billion, two hundred fifteen million, four hundred fifty-three thousand, two hundred twenty-one".