221211352 has 16 divisors (see below), whose sum is σ = 415603440. Its totient is φ = 110383776.

The previous prime is 221211269. The next prime is 221211379. The reversal of 221211352 is 253112122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23463 + ... + 31510.

It is an arithmetic number, because the mean of its divisors is an integer number (25975215).

Almost surely, 2^221211352 is an apocalyptic number.

It is an amenable number.

221211352 is a deficient number, since it is larger than the sum of its proper divisors (194392088).

221211352 is a wasteful number, since it uses less digits than its factorization.

221211352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55482 (or 55478 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 221211352 is about 14873.1755855970. The cubic root of 221211352 is about 604.7870315683.

Adding to 221211352 its reverse (253112122), we get a palindrome (474323474).

The spelling of 221211352 in words is "two hundred twenty-one million, two hundred eleven thousand, three hundred fifty-two".