221303134 has 12 divisors (see below), whose sum is σ = 359454456. Its totient is φ = 102139752.

The previous prime is 221303129. The next prime is 221303189. The reversal of 221303134 is 431303122.

221303134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 327034 + ... + 327709.

It is an arithmetic number, because the mean of its divisors is an integer number (29954538).

Almost surely, 2^221303134 is an apocalyptic number.

221303134 is a deficient number, since it is larger than the sum of its proper divisors (138151322).

221303134 is a wasteful number, since it uses less digits than its factorization.

221303134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654771 (or 654758 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 221303134 is about 14876.2607532942. The cubic root of 221303134 is about 604.8706633344.

Adding to 221303134 its reverse (431303122), we get a palindrome (652606256).

The spelling of 221303134 in words is "two hundred twenty-one million, three hundred three thousand, one hundred thirty-four".