221461550 has 24 divisors (see below), whose sum is σ = 436150656. Its totient is φ = 83373440.

The previous prime is 221461543. The next prime is 221461553. The reversal of 221461550 is 55164122.

221461550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221461553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129422 + ... + 131121.

It is an arithmetic number, because the mean of its divisors is an integer number (18172944).

Almost surely, 2^221461550 is an apocalyptic number.

221461550 is a deficient number, since it is larger than the sum of its proper divisors (214689106).

221461550 is a wasteful number, since it uses less digits than its factorization.

221461550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260572 (or 260567 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 221461550 is about 14881.5842570608. The cubic root of 221461550 is about 605.0149576249.

The spelling of 221461550 in words is "two hundred twenty-one million, four hundred sixty-one thousand, five hundred fifty".