53221002161 has 2 divisors, whose sum is σ = 53221002162. Its totient is φ = 53221002160.

The previous prime is 53221002127. The next prime is 53221002173. The reversal of 53221002161 is 16120012235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51724859761 + 1496142400 = 227431^2 + 38680^2 .

It is a cyclic number.

It is not a de Polignac number, because 53221002161 - 2¹⁸ = 53220740017 is a prime.

It is not a weakly prime, because it can be changed into another prime (53221002181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26610501080 + 26610501081.

It is an arithmetic number, because the mean of its divisors is an integer number (26610501081).

Almost surely, 2^53221002161 is an apocalyptic number.

It is an amenable number.

53221002161 is a deficient number, since it is larger than the sum of its proper divisors (1).

53221002161 is an equidigital number, since it uses as much as digits as its factorization.

53221002161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 53221002161 its reverse (16120012235), we get a palindrome (69341014396).

The spelling of 53221002161 in words is "fifty-three billion, two hundred twenty-one million, two thousand, one hundred sixty-one".