221490039 has 8 divisors (see below), whose sum is σ = 295392240. Its totient is φ = 147623936.

The previous prime is 221490019. The next prime is 221490041. The reversal of 221490039 is 930094122.

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

It is a cyclic number.

It is not a de Polignac number, because 221490039 - 2⁷ = 221489911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221489988 and 221490015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221490019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12919 + ... + 24695.

It is an arithmetic number, because the mean of its divisors is an integer number (36924030).

Almost surely, 2^221490039 is an apocalyptic number.

221490039 is a deficient number, since it is larger than the sum of its proper divisors (73902201).

221490039 is a wasteful number, since it uses less digits than its factorization.

221490039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18049.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 221490039 is about 14882.5414160351. The cubic root of 221490039 is about 605.0408997234.

The spelling of 221490039 in words is "two hundred twenty-one million, four hundred ninety thousand, thirty-nine".