221242038 has 8 divisors (see below), whose sum is σ = 442484088. Its totient is φ = 73747344.

The previous prime is 221242003. The next prime is 221242039. The reversal of 221242038 is 830242122.

It is a sphenic number, since it is the product of 3 distinct primes.

221242038 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221241999 and 221242017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221242039) 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 3 ways as a sum of consecutive naturals, for example, 18436831 + ... + 18436842.

It is an arithmetic number, because the mean of its divisors is an integer number (55310511).

Almost surely, 2^221242038 is an apocalyptic number.

221242038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221242038 is a wasteful number, since it uses less digits than its factorization.

221242038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36873678.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 221242038 is about 14874.2071385335. The cubic root of 221242038 is about 604.8149952278.

The spelling of 221242038 in words is "two hundred twenty-one million, two hundred forty-two thousand, thirty-eight".