221154029 has 8 divisors (see below), whose sum is σ = 229596960. Its totient is φ = 212765616.

The previous prime is 221154019. The next prime is 221154061. The reversal of 221154029 is 920451122.

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 221154029 - 2¹² = 221149933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221153989 and 221154007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221154019) 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, 5267 + ... + 21680.

It is an arithmetic number, because the mean of its divisors is an integer number (28699620).

Almost surely, 2^221154029 is an apocalyptic number.

221154029 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

221154029 is a deficient number, since it is larger than the sum of its proper divisors (8442931).

221154029 is a wasteful number, since it uses less digits than its factorization.

221154029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27259.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 221154029 is about 14871.2484008573. The cubic root of 221154029 is about 604.7347871096.

The spelling of 221154029 in words is "two hundred twenty-one million, one hundred fifty-four thousand, twenty-nine".