221885749 has 8 divisors (see below), whose sum is σ = 223479360. Its totient is φ = 220298400.

The previous prime is 221885747. The next prime is 221885753. The reversal of 221885749 is 947588122.

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 221885749 - 2¹ = 221885747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221885699 and 221885708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221885747) 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, 86122 + ... + 88660.

It is an arithmetic number, because the mean of its divisors is an integer number (27934920).

Almost surely, 2^221885749 is an apocalyptic number.

It is an amenable number.

221885749 is a deficient number, since it is larger than the sum of its proper divisors (1593611).

221885749 is a wasteful number, since it uses less digits than its factorization.

221885749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131.

The product of its digits is 322560, while the sum is 46.

The square root of 221885749 is about 14895.8299198131. The cubic root of 221885749 is about 605.4010036440.

The spelling of 221885749 in words is "two hundred twenty-one million, eight hundred eighty-five thousand, seven hundred forty-nine".