55213025340 has 192 divisors, whose sum is σ = 182372456448. Its totient is φ = 12329472000.

The previous prime is 55213025297. The next prime is 55213025341. The reversal of 55213025340 is 4352031255.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55213025298 and 55213025307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55213025341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 474990 + ... + 579690.

It is an arithmetic number, because the mean of its divisors is an integer number (949856544).

Almost surely, 2^55213025340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55213025340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91186228224).

55213025340 is an abundant number, since it is smaller than the sum of its proper divisors (127159431108).

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

55213025340 is a wasteful number, since it uses less digits than its factorization.

55213025340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104788 (or 104786 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 55213025340 its reverse (4352031255), we get a palindrome (59565056595).

The spelling of 55213025340 in words is "fifty-five billion, two hundred thirteen million, twenty-five thousand, three hundred forty".