221150438 has 16 divisors (see below), whose sum is σ = 334320000. Its totient is φ = 109714176.

The previous prime is 221150431. The next prime is 221150441. The reversal of 221150438 is 834051122.

221150438 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221150431) 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 7 ways as a sum of consecutive naturals, for example, 176438 + ... + 177686.

It is an arithmetic number, because the mean of its divisors is an integer number (20895000).

Almost surely, 2^221150438 is an apocalyptic number.

221150438 is a deficient number, since it is larger than the sum of its proper divisors (113169562).

221150438 is a wasteful number, since it uses less digits than its factorization.

221150438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 221150438 is about 14871.1276640341. The cubic root of 221150438 is about 604.7315139544.

The spelling of 221150438 in words is "two hundred twenty-one million, one hundred fifty thousand, four hundred thirty-eight".