221160621 has 8 divisors (see below), whose sum is σ = 321688224. Its totient is φ = 134036720.

The previous prime is 221160557. The next prime is 221160659. The reversal of 221160621 is 126061122.

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 221160621 - 2⁶ = 221160557 is a prime.

It is a super-2 number, since 2×221160621² = 97824040562211282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221160691) 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, 3350886 + ... + 3350951.

It is an arithmetic number, because the mean of its divisors is an integer number (40211028).

Almost surely, 2^221160621 is an apocalyptic number.

It is an amenable number.

221160621 is a deficient number, since it is larger than the sum of its proper divisors (100527603).

221160621 is a wasteful number, since it uses less digits than its factorization.

221160621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701851.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 221160621 is about 14871.4700349360. The cubic root of 221160621 is about 604.7407955496.

The spelling of 221160621 in words is "two hundred twenty-one million, one hundred sixty thousand, six hundred twenty-one".