53511321534 has 64 divisors (see below), whose sum is σ = 120525090048. Its totient is φ = 15698188800.

The previous prime is 53511321533. The next prime is 53511321559. The reversal of 53511321534 is 43512311535.

It is a super-2 number, since 2×53511321534² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 53511321495 and 53511321504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53511321533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237264 + ... + 404124.

It is an arithmetic number, because the mean of its divisors is an integer number (1883204532).

Almost surely, 2^53511321534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53511321534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60262545024).

53511321534 is an abundant number, since it is smaller than the sum of its proper divisors (67013768514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53511321534 is a wasteful number, since it uses less digits than its factorization.

53511321534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167033.

The product of its digits is 27000, while the sum is 33.

Subtracting from 53511321534 its reverse (43512311535), we obtain a palindrome (9999009999).

The spelling of 53511321534 in words is "fifty-three billion, five hundred eleven million, three hundred twenty-one thousand, five hundred thirty-four".