221377338 has 48 divisors (see below), whose sum is σ = 590343936. Its totient is φ = 58384800.

The previous prime is 221377337. The next prime is 221377339. The reversal of 221377338 is 833773122.

It is an interprime number because it is at equal distance from previous prime (221377337) and next prime (221377339).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221377337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65938 + ... + 69213.

It is an arithmetic number, because the mean of its divisors is an integer number (12298832).

Almost surely, 2^221377338 is an apocalyptic number.

221377338 is an abundant number, since it is smaller than the sum of its proper divisors (368966598).

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

221377338 is a wasteful number, since it uses less digits than its factorization.

221377338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135179 (or 135176 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 221377338 is about 14878.7545849779. The cubic root of 221377338 is about 604.9382611224.

The spelling of 221377338 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, three hundred thirty-eight".