221761348 has 6 divisors (see below), whose sum is σ = 388082366. Its totient is φ = 110880672.

The previous prime is 221761343. The next prime is 221761367. The reversal of 221761348 is 843167122.

It can be written as a sum of positive squares in only one way, i.e., 168792064 + 52969284 = 12992^2 + 7278^2 .

It is not an unprimeable number, because it can be changed into a prime (221761343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27720165 + ... + 27720172.

Almost surely, 2^221761348 is an apocalyptic number.

It is an amenable number.

221761348 is a deficient number, since it is larger than the sum of its proper divisors (166321018).

221761348 is a wasteful number, since it uses less digits than its factorization.

221761348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55440341 (or 55440339 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 221761348 is about 14891.6536355101. The cubic root of 221761348 is about 605.2878424492.

The spelling of 221761348 in words is "two hundred twenty-one million, seven hundred sixty-one thousand, three hundred forty-eight".