53111144021 has 16 divisors (see below), whose sum is σ = 58481934336. Its totient is φ = 47930515776.

The previous prime is 53111144017. The next prime is 53111144039. The reversal of 53111144021 is 12044111135.

It is not a de Polignac number, because 53111144021 - 2² = 53111144017 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 (53111144921) 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, 58796 + ... + 331178.

It is an arithmetic number, because the mean of its divisors is an integer number (3655120896).

Almost surely, 2^53111144021 is an apocalyptic number.

It is an amenable number.

53111144021 is a deficient number, since it is larger than the sum of its proper divisors (5370790315).

53111144021 is a wasteful number, since it uses less digits than its factorization.

53111144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272732.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 53111144021 its reverse (12044111135), we get a palindrome (65155255156).

It can be divided in two parts, 5311114 and 4021, that added together give a palindrome (5315135).

The spelling of 53111144021 in words is "fifty-three billion, one hundred eleven million, one hundred forty-four thousand, twenty-one".