221266974 has 8 divisors (see below), whose sum is σ = 442533960. Its totient is φ = 73755656.

The previous prime is 221266963. The next prime is 221266999. The reversal of 221266974 is 479662122.

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

221266974 is an admirable number.

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, 18438909 + ... + 18438920.

It is an arithmetic number, because the mean of its divisors is an integer number (55316745).

Almost surely, 2^221266974 is an apocalyptic number.

221266974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221266974 is a wasteful number, since it uses less digits than its factorization.

221266974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36877834.

The product of its digits is 72576, while the sum is 39.

The square root of 221266974 is about 14875.0453444687. The cubic root of 221266974 is about 604.8377171003.

The spelling of 221266974 in words is "two hundred twenty-one million, two hundred sixty-six thousand, nine hundred seventy-four".