221947068 has 48 divisors (see below), whose sum is σ = 603948800. Its totient is φ = 63412272.

The previous prime is 221947057. The next prime is 221947109. The reversal of 221947068 is 860749122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22846 + ... + 31077.

Almost surely, 2^221947068 is an apocalyptic number.

221947068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221947068 is an abundant number, since it is smaller than the sum of its proper divisors (382001732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221947068 is a wasteful number, since it uses less digits than its factorization.

221947068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53951 (or 53935 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 221947068 is about 14897.8880382422. Note that the first 3 decimals coincide. The cubic root of 221947068 is about 605.4567668242.

The spelling of 221947068 in words is "two hundred twenty-one million, nine hundred forty-seven thousand, sixty-eight".