1656222213 has 8 divisors (see below), whose sum is σ = 2279531776. Its totient is φ = 1068530400.

The previous prime is 1656222193. The next prime is 1656222221. The reversal of 1656222213 is 3122226561.

1656222213 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1656222213 - 2⁹ = 1656221701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656222223) 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, 8904328 + ... + 8904513.

It is an arithmetic number, because the mean of its divisors is an integer number (284941472).

Almost surely, 2^1656222213 is an apocalyptic number.

It is an amenable number.

1656222213 is a deficient number, since it is larger than the sum of its proper divisors (623309563).

1656222213 is a wasteful number, since it uses less digits than its factorization.

1656222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17808875.

The product of its digits is 8640, while the sum is 30.

The square root of 1656222213 is about 40696.7101004492. The cubic root of 1656222213 is about 1183.1492561295.

Adding to 1656222213 its reverse (3122226561), we get a palindrome (4778448774).

The spelling of 1656222213 in words is "one billion, six hundred fifty-six million, two hundred twenty-two thousand, two hundred thirteen".