2211620641 has 2 divisors, whose sum is σ = 2211620642. Its totient is φ = 2211620640.

The previous prime is 2211620633. The next prime is 2211620657. The reversal of 2211620641 is 1460261122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1842212241 + 369408400 = 42921^2 + 19220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211620641 - 2³ = 2211620633 is a prime.

It is not a weakly prime, because it can be changed into another prime (2211620681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105810320 + 1105810321.

It is an arithmetic number, because the mean of its divisors is an integer number (1105810321).

Almost surely, 2^2211620641 is an apocalyptic number.

It is an amenable number.

2211620641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211620641 is an equidigital number, since it uses as much as digits as its factorization.

2211620641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2211620641 is about 47027.8708958847. The cubic root of 2211620641 is about 1302.8773822084.

Adding to 2211620641 its reverse (1460261122), we get a palindrome (3671881763).

The spelling of 2211620641 in words is "two billion, two hundred eleven million, six hundred twenty thousand, six hundred forty-one".