221215341 has 24 divisors (see below), whose sum is σ = 308459424. Its totient is φ = 140978880.

The previous prime is 221215333. The next prime is 221215343. The reversal of 221215341 is 143512122.

It is not a de Polignac number, because 221215341 - 2³ = 221215333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221215343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250086 + ... + 250968.

It is an arithmetic number, because the mean of its divisors is an integer number (12852476).

Almost surely, 2^221215341 is an apocalyptic number.

It is an amenable number.

221215341 is a deficient number, since it is larger than the sum of its proper divisors (87244083).

221215341 is an equidigital number, since it uses as much as digits as its factorization.

221215341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 984 counting only the distinct ones).

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

The square root of 221215341 is about 14873.3096854735. The cubic root of 221215341 is about 604.7906668262.

Adding to 221215341 its reverse (143512122), we get a palindrome (364727463).

The spelling of 221215341 in words is "two hundred twenty-one million, two hundred fifteen thousand, three hundred forty-one".