1620222113 has 2 divisors, whose sum is σ = 1620222114. Its totient is φ = 1620222112.

The previous prime is 1620222101. The next prime is 1620222173. The reversal of 1620222113 is 3112220261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1117431184 + 502790929 = 33428^2 + 22423^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620222113 - 2⁶ = 1620222049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620222173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810111056 + 810111057.

It is an arithmetic number, because the mean of its divisors is an integer number (810111057).

Almost surely, 2^1620222113 is an apocalyptic number.

It is an amenable number.

1620222113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620222113 is an equidigital number, since it uses as much as digits as its factorization.

1620222113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1620222113 is about 40251.9827213518. The cubic root of 1620222113 is about 1174.5139653914.

Adding to 1620222113 its reverse (3112220261), we get a palindrome (4732442374).

The spelling of 1620222113 in words is "one billion, six hundred twenty million, two hundred twenty-two thousand, one hundred thirteen".