2220610657 has 4 divisors (see below), whose sum is σ = 2221255360. Its totient is φ = 2219965956.

The previous prime is 2220610619. The next prime is 2220610727. The reversal of 2220610657 is 7560160222.

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 not a de Polignac number, because 2220610657 - 2⁷ = 2220610529 is a prime.

It is a super-2 number, since 2×2220610657² = 9862223379963943298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220610607) 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, 317157 + ... + 324082.

It is an arithmetic number, because the mean of its divisors is an integer number (555313840).

Almost surely, 2^2220610657 is an apocalyptic number.

It is an amenable number.

2220610657 is a deficient number, since it is larger than the sum of its proper divisors (644703).

2220610657 is an equidigital number, since it uses as much as digits as its factorization.

2220610657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644702.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2220610657 is about 47123.3557485033. The cubic root of 2220610657 is about 1304.6403508759.

Adding to 2220610657 its reverse (7560160222), we get a palindrome (9780770879).

The spelling of 2220610657 in words is "two billion, two hundred twenty million, six hundred ten thousand, six hundred fifty-seven".