221395848 has 32 divisors (see below), whose sum is σ = 562874400. Its totient is φ = 72547328.

The previous prime is 221395843. The next prime is 221395871. The reversal of 221395848 is 848593122.

It is a super-2 number, since 2×221395848² = 98032243023278208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (221395843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76761 + ... + 79592.

It is an arithmetic number, because the mean of its divisors is an integer number (17589825).

Almost surely, 2^221395848 is an apocalyptic number.

It is an amenable number.

221395848 is an abundant number, since it is smaller than the sum of its proper divisors (341478552).

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

221395848 is a wasteful number, since it uses less digits than its factorization.

221395848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156421 (or 156417 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 221395848 is about 14879.3765998445. The cubic root of 221395848 is about 604.9551208655.

The spelling of 221395848 in words is "two hundred twenty-one million, three hundred ninety-five thousand, eight hundred forty-eight".