53220052161 has 10 divisors (see below), whose sum is σ = 79501559522. Its totient is φ = 35480034720.

The previous prime is 53220052157. The next prime is 53220052181. The reversal of 53220052161 is 16125002235.

It is a happy number.

53220052161 is a `hidden beast` number, since 532 + 20 + 0 + 52 + 1 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40733330625 + 12486721536 = 201825^2 + 111744^2 .

It is not a de Polignac number, because 53220052161 - 2² = 53220052157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53220052121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 328518760 + ... + 328518921.

Almost surely, 2^53220052161 is an apocalyptic number.

It is an amenable number.

53220052161 is a deficient number, since it is larger than the sum of its proper divisors (26281507361).

53220052161 is an equidigital number, since it uses as much as digits as its factorization.

53220052161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657037693 (or 657037684 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 53220052161 its reverse (16125002235), we get a palindrome (69345054396).

The spelling of 53220052161 in words is "fifty-three billion, two hundred twenty million, fifty-two thousand, one hundred sixty-one".