221482418 has 4 divisors (see below), whose sum is σ = 332223630. Its totient is φ = 110741208.

The previous prime is 221482397. The next prime is 221482427. The reversal of 221482418 is 814284122.

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., 178409449 + 43072969 = 13357^2 + 6563^2 .

It is a super-2 number, since 2×221482418² = 98108922966253448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55370603 + ... + 55370606.

Almost surely, 2^221482418 is an apocalyptic number.

221482418 is a deficient number, since it is larger than the sum of its proper divisors (110741212).

221482418 is a wasteful number, since it uses less digits than its factorization.

221482418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110741211.

The product of its digits is 8192, while the sum is 32.

The square root of 221482418 is about 14882.2853755732. The cubic root of 221482418 is about 605.0339602547.

The spelling of 221482418 in words is "two hundred twenty-one million, four hundred eighty-two thousand, four hundred eighteen".