221650148 has 12 divisors (see below), whose sum is σ = 410704812. Its totient is φ = 104305920.

The previous prime is 221650127. The next prime is 221650153. The reversal of 221650148 is 841056122.

221650148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 136235584 + 85414564 = 11672^2 + 9242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221650148.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1629713 + ... + 1629848.

It is an arithmetic number, because the mean of its divisors is an integer number (34225401).

Almost surely, 2^221650148 is an apocalyptic number.

It is an amenable number.

221650148 is a deficient number, since it is larger than the sum of its proper divisors (189054664).

221650148 is a wasteful number, since it uses less digits than its factorization.

221650148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259582 (or 3259580 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 221650148 is about 14887.9195322919. The cubic root of 221650148 is about 605.1866536982.

The spelling of 221650148 in words is "two hundred twenty-one million, six hundred fifty thousand, one hundred forty-eight".