221051010 has 16 divisors (see below), whose sum is σ = 530522496. Its totient is φ = 58946928.

The previous prime is 221051009. The next prime is 221051029. The reversal of 221051010 is 10150122.

It is an unprimeable number.

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, 3684154 + ... + 3684213.

It is an arithmetic number, because the mean of its divisors is an integer number (33157656).

Almost surely, 2^221051010 is an apocalyptic number.

221051010 is an abundant number, since it is smaller than the sum of its proper divisors (309471486).

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

221051010 is a wasteful number, since it uses less digits than its factorization.

221051010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7368377.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 221051010 is about 14867.7843002917. The cubic root of 221051010 is about 604.6408724003.

The spelling of 221051010 in words is "two hundred twenty-one million, fifty-one thousand, ten".