221745029 has 8 divisors (see below), whose sum is σ = 254635680. Its totient is φ = 190976400.

The previous prime is 221745011. The next prime is 221745061. The reversal of 221745029 is 920547122.

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 221745029 - 2⁸ = 221744773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221744986 and 221745004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221745089) 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, 530282 + ... + 530699.

It is an arithmetic number, because the mean of its divisors is an integer number (31829460).

Almost surely, 2^221745029 is an apocalyptic number.

It is an amenable number.

221745029 is a deficient number, since it is larger than the sum of its proper divisors (32890651).

221745029 is a wasteful number, since it uses less digits than its factorization.

221745029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061011.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 221745029 is about 14891.1057010552. The cubic root of 221745029 is about 605.2729947542.

The spelling of 221745029 in words is "two hundred twenty-one million, seven hundred forty-five thousand, twenty-nine".