221417494 has 8 divisors (see below), whose sum is σ = 343578960. Its totient is φ = 106891176.

The previous prime is 221417489. The next prime is 221417519. The reversal of 221417494 is 494714122.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1908714 + ... + 1908829.

It is an arithmetic number, because the mean of its divisors is an integer number (42947370).

Almost surely, 2^221417494 is an apocalyptic number.

221417494 is a deficient number, since it is larger than the sum of its proper divisors (122161466).

221417494 is a wasteful number, since it uses less digits than its factorization.

221417494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817574.

The product of its digits is 16128, while the sum is 34.

The square root of 221417494 is about 14880.1039646906. The cubic root of 221417494 is about 604.9748358270.

The spelling of 221417494 in words is "two hundred twenty-one million, four hundred seventeen thousand, four hundred ninety-four".