221252349 has 8 divisors (see below), whose sum is σ = 296326912. Its totient is φ = 146839680.

The previous prime is 221252347. The next prime is 221252357. The reversal of 221252349 is 943252122.

221252349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221252349 - 2¹ = 221252347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221252347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164692 + ... + 166029.

It is an arithmetic number, because the mean of its divisors is an integer number (37040864).

Almost surely, 2^221252349 is an apocalyptic number.

It is an amenable number.

221252349 is a deficient number, since it is larger than the sum of its proper divisors (75074563).

221252349 is a wasteful number, since it uses less digits than its factorization.

221252349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330947.

The product of its digits is 8640, while the sum is 30.

The square root of 221252349 is about 14874.5537412051. The cubic root of 221252349 is about 604.8243908963.

The spelling of 221252349 in words is "two hundred twenty-one million, two hundred fifty-two thousand, three hundred forty-nine".