221041534 has 16 divisors (see below), whose sum is σ = 381201408. Its totient is φ = 94163832.

The previous prime is 221041511. The next prime is 221041547. The reversal of 221041534 is 435140122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44934 + ... + 49609.

It is an arithmetic number, because the mean of its divisors is an integer number (23825088).

Almost surely, 2^221041534 is an apocalyptic number.

221041534 is a deficient number, since it is larger than the sum of its proper divisors (160159874).

221041534 is a wasteful number, since it uses less digits than its factorization.

221041534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94719.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 221041534 is about 14867.4656212819. The cubic root of 221041534 is about 604.6322323753.

Adding to 221041534 its reverse (435140122), we get a palindrome (656181656).

The spelling of 221041534 in words is "two hundred twenty-one million, forty-one thousand, five hundred thirty-four".