221453954 has 8 divisors (see below), whose sum is σ = 341158908. Its totient is φ = 107734320.

The previous prime is 221453933. The next prime is 221453977. The reversal of 221453954 is 459354122.

It can be written as a sum of positive squares in 2 ways, for example, as 216766729 + 4687225 = 14723^2 + 2165^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496237 + ... + 1496384.

Almost surely, 2^221453954 is an apocalyptic number.

221453954 is a deficient number, since it is larger than the sum of its proper divisors (119704954).

221453954 is a wasteful number, since it uses less digits than its factorization.

221453954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992660.

The product of its digits is 43200, while the sum is 35.

The square root of 221453954 is about 14881.3290401093. The cubic root of 221453954 is about 605.0080403275.

The spelling of 221453954 in words is "two hundred twenty-one million, four hundred fifty-three thousand, nine hundred fifty-four".