53205032646421 has 16 divisors (see below), whose sum is σ = 55410679941120. Its totient is φ = 51031232227440.

The previous prime is 53205032646419. The next prime is 53205032646463. The reversal of 53205032646421 is 12464623050235.

It is a cyclic number.

It is not a de Polignac number, because 53205032646421 - 2¹ = 53205032646419 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 (53205032646221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7988011 + ... + 13046776.

It is an arithmetic number, because the mean of its divisors is an integer number (3463167496320).

Almost surely, 2^{53205032646421} is an apocalyptic number.

It is an amenable number.

53205032646421 is a deficient number, since it is larger than the sum of its proper divisors (2205647294699).

53205032646421 is a wasteful number, since it uses less digits than its factorization.

53205032646421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21035544.

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 53205032646421 its reverse (12464623050235), we get a palindrome (65669655696656).

The spelling of 53205032646421 in words is "fifty-three trillion, two hundred five billion, thirty-two million, six hundred forty-six thousand, four hundred twenty-one".