221048378 has 4 divisors (see below), whose sum is σ = 331572570. Its totient is φ = 110524188.

The previous prime is 221048357. The next prime is 221048389. The reversal of 221048378 is 873840122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 208889209 + 12159169 = 14453^2 + 3487^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55262093 + ... + 55262096.

Almost surely, 2^221048378 is an apocalyptic number.

221048378 is a deficient number, since it is larger than the sum of its proper divisors (110524192).

221048378 is a wasteful number, since it uses less digits than its factorization.

221048378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110524191.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 221048378 is about 14867.6957865030. The cubic root of 221048378 is about 604.6384726208.

The spelling of 221048378 in words is "two hundred twenty-one million, forty-eight thousand, three hundred seventy-eight".