221557014 has 24 divisors (see below), whose sum is σ = 548617680. Its totient is φ = 63301968.

The previous prime is 221557009. The next prime is 221557019. The reversal of 221557014 is 410755122.

It is an interprime number because it is at equal distance from previous prime (221557009) and next prime (221557019).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221557019) 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 11 ways as a sum of consecutive naturals, for example, 879069 + ... + 879320.

It is an arithmetic number, because the mean of its divisors is an integer number (22859070).

Almost surely, 2^221557014 is an apocalyptic number.

221557014 is an abundant number, since it is smaller than the sum of its proper divisors (327060666).

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

221557014 is a wasteful number, since it uses less digits than its factorization.

221557014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758404 (or 1758401 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 221557014 is about 14884.7913656860. The cubic root of 221557014 is about 605.1018784333.

The spelling of 221557014 in words is "two hundred twenty-one million, five hundred fifty-seven thousand, fourteen".