611000221 has 8 divisors (see below), whose sum is σ = 686609280. Its totient is φ = 539478192.

The previous prime is 611000191. The next prime is 611000231. The reversal of 611000221 is 122000116.

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 611000221 - 2¹³ = 610992029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611000231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021441 + ... + 1022038.

It is an arithmetic number, because the mean of its divisors is an integer number (85826160).

Almost surely, 2^611000221 is an apocalyptic number.

It is an amenable number.

611000221 is a deficient number, since it is larger than the sum of its proper divisors (75609059).

611000221 is a wasteful number, since it uses less digits than its factorization.

611000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043515.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 611000221 is about 24718.4186589676. The cubic root of 611000221 is about 848.5558967263. Note that the first 3 decimals are identical.

Adding to 611000221 its reverse (122000116), we get a palindrome (733000337).

The spelling of 611000221 in words is "six hundred eleven million, two hundred twenty-one", and thus it is an aban number.