221353870 has 8 divisors (see below), whose sum is σ = 398436984. Its totient is φ = 88541544.

The previous prime is 221353859. The next prime is 221353871. The reversal of 221353870 is 78353122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221353871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11067684 + ... + 11067703.

It is an arithmetic number, because the mean of its divisors is an integer number (49804623).

Almost surely, 2^221353870 is an apocalyptic number.

221353870 is a deficient number, since it is larger than the sum of its proper divisors (177083114).

221353870 is a wasteful number, since it uses less digits than its factorization.

221353870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22135394.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 221353870 is about 14877.9659228001. The cubic root of 221353870 is about 604.9168840581.

The spelling of 221353870 in words is "two hundred twenty-one million, three hundred fifty-three thousand, eight hundred seventy".