2111530533400 has 96 divisors (see below), whose sum is σ = 5039556465600. Its totient is φ = 822496896000.

The previous prime is 2111530533391. The next prime is 2111530533401. The reversal of 2111530533400 is 43350351112.

It is a happy number.

It is a super-2 number, since 2×2111530533400² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111530533401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238050 + ... + 2068750.

It is an arithmetic number, because the mean of its divisors is an integer number (52495379850).

Almost surely, 2^{2111530533400} is an apocalyptic number.

2111530533400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111530533400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2519778232800).

2111530533400 is an abundant number, since it is smaller than the sum of its proper divisors (2928025932200).

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

2111530533400 is a wasteful number, since it uses less digits than its factorization.

2111530533400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830869 (or 1830860 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 2111530533400 its reverse (43350351112), we get a palindrome (2154880884512).

The spelling of 2111530533400 in words is "two trillion, one hundred eleven billion, five hundred thirty million, five hundred thirty-three thousand, four hundred".