221052751 has 8 divisors (see below), whose sum is σ = 234664560. Its totient is φ = 207508608.

The previous prime is 221052737. The next prime is 221052757. The reversal of 221052751 is 157250122.

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

It is a cyclic number.

It is not a de Polignac number, because 221052751 - 2⁵ = 221052719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221052757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10101 + ... + 23326.

It is an arithmetic number, because the mean of its divisors is an integer number (29333070).

Almost surely, 2^221052751 is an apocalyptic number.

221052751 is a deficient number, since it is larger than the sum of its proper divisors (13611809).

221052751 is a wasteful number, since it uses less digits than its factorization.

221052751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33833.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 221052751 is about 14867.8428495865. The cubic root of 221052751 is about 604.6424597820.

The spelling of 221052751 in words is "two hundred twenty-one million, fifty-two thousand, seven hundred fifty-one".