52105221144621 has 6 divisors (see below), whose sum is σ = 75263097208910. Its totient is φ = 34736814096408.

The previous prime is 52105221144601. The next prime is 52105221144623. The reversal of 52105221144621 is 12644112250125.

52105221144621 is a `hidden beast` number, since 5 + 2 + 1 + 0 + 5 + 2 + 21 + 1 + 4 + 4 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49200194061225 + 2905027083396 = 7014285^2 + 1704414^2 .

It is not a de Polignac number, because 52105221144621 - 2²³ = 52105212756013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52105221144623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2894734508026 + ... + 2894734508043.

Almost surely, 2^{52105221144621} is an apocalyptic number.

It is an amenable number.

52105221144621 is a deficient number, since it is larger than the sum of its proper divisors (23157876064289).

52105221144621 is a wasteful number, since it uses less digits than its factorization.

52105221144621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789469016075 (or 5789469016072 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

Adding to 52105221144621 its reverse (12644112250125), we get a palindrome (64749333394746).

The spelling of 52105221144621 in words is "fifty-two trillion, one hundred five billion, two hundred twenty-one million, one hundred forty-four thousand, six hundred twenty-one".