7800221053 has 2 divisors, whose sum is σ = 7800221054. Its totient is φ = 7800221052.

The previous prime is 7800221041. The next prime is 7800221131. The reversal of 7800221053 is 3501220087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7706557369 + 93663684 = 87787^2 + 9678^2 .

It is a cyclic number.

It is not a de Polignac number, because 7800221053 - 2²⁹ = 7263350141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7800221453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3900110526 + 3900110527.

It is an arithmetic number, because the mean of its divisors is an integer number (3900110527).

Almost surely, 2^7800221053 is an apocalyptic number.

It is an amenable number.

7800221053 is a deficient number, since it is larger than the sum of its proper divisors (1).

7800221053 is an equidigital number, since it uses as much as digits as its factorization.

7800221053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 7800221053 is about 88318.8601205881. The cubic root of 7800221053 is about 1983.2112171469.

The spelling of 7800221053 in words is "seven billion, eight hundred million, two hundred twenty-one thousand, fifty-three".