221043029 has 8 divisors (see below), whose sum is σ = 223385280. Its totient is φ = 218707776.

The previous prime is 221043023. The next prime is 221043059. The reversal of 221043029 is 920340122.

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 221043029 - 2¹² = 221038933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221042995 and 221043013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221043023) 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, 82184 + ... + 84830.

It is an arithmetic number, because the mean of its divisors is an integer number (27923160).

Almost surely, 2^221043029 is an apocalyptic number.

It is an amenable number.

221043029 is a deficient number, since it is larger than the sum of its proper divisors (2342251).

221043029 is a wasteful number, since it uses less digits than its factorization.

221043029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 221043029 is about 14867.5158987640. The cubic root of 221043029 is about 604.6335955024.

The spelling of 221043029 in words is "two hundred twenty-one million, forty-three thousand, twenty-nine".