221499330 has 32 divisors (see below), whose sum is σ = 572491584. Its totient is φ = 54522816.

The previous prime is 221499329. The next prime is 221499347. The reversal of 221499330 is 33994122.

It is a junction number, because it is equal to n+sod(n) for n = 221499291 and 221499300.

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, 283584 + ... + 284363.

It is an arithmetic number, because the mean of its divisors is an integer number (17890362).

Almost surely, 2^221499330 is an apocalyptic number.

221499330 is an abundant number, since it is smaller than the sum of its proper divisors (350992254).

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

221499330 is a wasteful number, since it uses less digits than its factorization.

221499330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567970.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 221499330 is about 14882.8535570300. The cubic root of 221499330 is about 605.0493596320.

The spelling of 221499330 in words is "two hundred twenty-one million, four hundred ninety-nine thousand, three hundred thirty".