221248330 has 16 divisors (see below), whose sum is σ = 407509344. Its totient is φ = 86441040.

The previous prime is 221248301. The next prime is 221248343. The reversal of 221248330 is 33842122.

It is a junction number, because it is equal to n+sod(n) for n = 221248295 and 221248304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256836 + ... + 257695.

It is an arithmetic number, because the mean of its divisors is an integer number (25469334).

Almost surely, 2^221248330 is an apocalyptic number.

221248330 is a deficient number, since it is larger than the sum of its proper divisors (186261014).

221248330 is a wasteful number, since it uses less digits than its factorization.

221248330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514581.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 221248330 is about 14874.4186441017. The cubic root of 221248330 is about 604.8207287070.

The spelling of 221248330 in words is "two hundred twenty-one million, two hundred forty-eight thousand, three hundred thirty".