220819061 has 4 divisors (see below), whose sum is σ = 225954432. Its totient is φ = 215683692.

The previous prime is 220819013. The next prime is 220819097. The reversal of 220819061 is 160918022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220819061 is a prime.

It is a super-2 number, since 2×220819061² = 97522115401843442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220819661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567621 + ... + 2567706.

It is an arithmetic number, because the mean of its divisors is an integer number (56488608).

Almost surely, 2^220819061 is an apocalyptic number.

It is an amenable number.

220819061 is a deficient number, since it is larger than the sum of its proper divisors (5135371).

220819061 is an equidigital number, since it uses as much as digits as its factorization.

220819061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135370.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 220819061 is about 14859.9818640535. The cubic root of 220819061 is about 604.4293150051.

The spelling of 220819061 in words is "two hundred twenty million, eight hundred nineteen thousand, sixty-one".