221046429 has 8 divisors (see below), whose sum is σ = 294804640. Its totient is φ = 147326256.

The previous prime is 221046403. The next prime is 221046443. The reversal of 221046429 is 924640122.

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

It is not a de Polignac number, because 221046429 - 2⁸ = 221046173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221046396 and 221046405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231046429) 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, 9459 + ... + 23055.

It is an arithmetic number, because the mean of its divisors is an integer number (36850580).

Almost surely, 2^221046429 is an apocalyptic number.

It is an amenable number.

221046429 is a deficient number, since it is larger than the sum of its proper divisors (73758211).

221046429 is a wasteful number, since it uses less digits than its factorization.

221046429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 221046429 is about 14867.6302415684. The cubic root of 221046429 is about 604.6366955681.

The spelling of 221046429 in words is "two hundred twenty-one million, forty-six thousand, four hundred twenty-nine".