221199051 has 8 divisors (see below), whose sum is σ = 300497040. Its totient is φ = 144683552.

The previous prime is 221199001. The next prime is 221199101. The reversal of 221199051 is 150991122.

It is an interprime number because it is at equal distance from previous prime (221199001) and next prime (221199101).

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

It is a cyclic number.

It is not a de Polignac number, because 221199051 - 2⁹ = 221198539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221199001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695436 + ... + 695753.

It is an arithmetic number, because the mean of its divisors is an integer number (37562130).

Almost surely, 2^221199051 is an apocalyptic number.

221199051 is a deficient number, since it is larger than the sum of its proper divisors (79297989).

221199051 is a wasteful number, since it uses less digits than its factorization.

221199051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391245.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 221199051 is about 14872.7620501372. The cubic root of 221199051 is about 604.7758211382.

The spelling of 221199051 in words is "two hundred twenty-one million, one hundred ninety-nine thousand, fifty-one".