221400303 has 8 divisors (see below), whose sum is σ = 295655088. Its totient is φ = 147372864.

The previous prime is 221400253. The next prime is 221400307. The reversal of 221400303 is 303004122.

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

It is not a de Polignac number, because 221400303 - 2²⁰ = 220351727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221400307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54550 + ... + 58467.

It is an arithmetic number, because the mean of its divisors is an integer number (36956886).

Almost surely, 2^221400303 is an apocalyptic number.

221400303 is a deficient number, since it is larger than the sum of its proper divisors (74254785).

221400303 is a wasteful number, since it uses less digits than its factorization.

221400303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113673.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 221400303 is about 14879.5263029439. The cubic root of 221400303 is about 604.9591785402.

Adding to 221400303 its reverse (303004122), we get a palindrome (524404425).

The spelling of 221400303 in words is "two hundred twenty-one million, four hundred thousand, three hundred three".