221302148 has 6 divisors (see below), whose sum is σ = 387278766. Its totient is φ = 110651072.

The previous prime is 221302111. The next prime is 221302163. The reversal of 221302148 is 841203122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 116812864 + 104489284 = 10808^2 + 10222^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27662765 + ... + 27662772.

It is an arithmetic number, because the mean of its divisors is an integer number (64546461).

Almost surely, 2^221302148 is an apocalyptic number.

It is an amenable number.

221302148 is a deficient number, since it is larger than the sum of its proper divisors (165976618).

221302148 is a wasteful number, since it uses less digits than its factorization.

221302148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55325541 (or 55325539 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 221302148 is about 14876.2276132089. The cubic root of 221302148 is about 604.8697650140.

The spelling of 221302148 in words is "two hundred twenty-one million, three hundred two thousand, one hundred forty-eight".