221377838 has 8 divisors (see below), whose sum is σ = 362254680. Its totient is φ = 100626280.

The previous prime is 221377811. The next prime is 221377841. The reversal of 221377838 is 838773122.

221377838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×221377838³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221377795 and 221377804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5031293 + ... + 5031336.

It is an arithmetic number, because the mean of its divisors is an integer number (45281835).

Almost surely, 2^221377838 is an apocalyptic number.

221377838 is a deficient number, since it is larger than the sum of its proper divisors (140876842).

221377838 is a wasteful number, since it uses less digits than its factorization.

221377838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062642.

The product of its digits is 112896, while the sum is 41.

The square root of 221377838 is about 14878.7713874500. The cubic root of 221377838 is about 604.9387165573.

The spelling of 221377838 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, eight hundred thirty-eight".