221401068 has 24 divisors (see below), whose sum is σ = 590403072. Its totient is φ = 63257424.

The previous prime is 221401057. The next prime is 221401073. The reversal of 221401068 is 860104122.

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, 1317780 + ... + 1317947.

It is an arithmetic number, because the mean of its divisors is an integer number (24600128).

Almost surely, 2^221401068 is an apocalyptic number.

221401068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221401068 is an abundant number, since it is smaller than the sum of its proper divisors (369002004).

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

221401068 is a wasteful number, since it uses less digits than its factorization.

221401068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635741 (or 2635739 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 221401068 is about 14879.5520093852. The cubic root of 221401068 is about 604.9598753072.

The spelling of 221401068 in words is "two hundred twenty-one million, four hundred one thousand, sixty-eight".