221050427 has 16 divisors (see below), whose sum is σ = 251936160. Its totient is φ = 192264192.

The previous prime is 221050421. The next prime is 221050433. The reversal of 221050427 is 724050122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221050421) and next prime (221050433).

It is not a de Polignac number, because 221050427 - 2⁴ = 221050411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221050421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45353 + ... + 49989.

It is an arithmetic number, because the mean of its divisors is an integer number (15746010).

Almost surely, 2^221050427 is an apocalyptic number.

221050427 is a deficient number, since it is larger than the sum of its proper divisors (30885733).

221050427 is a wasteful number, since it uses less digits than its factorization.

221050427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 221050427 is about 14867.7646941294. The cubic root of 221050427 is about 604.6403408399.

The spelling of 221050427 in words is "two hundred twenty-one million, fifty thousand, four hundred twenty-seven".