2101013550 has 144 divisors (see below), whose sum is σ = 5831693712. Its totient is φ = 541900800.

The previous prime is 2101013539. The next prime is 2101013557. The reversal of 2101013550 is 553101012.

2101013550 is a `hidden beast` number, since 2 + 10 + 101 + 3 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101013557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4278805 + ... + 4279295.

It is an arithmetic number, because the mean of its divisors is an integer number (40497873).

Almost surely, 2^2101013550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101013550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2915846856).

2101013550 is an abundant number, since it is smaller than the sum of its proper divisors (3730680162).

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

2101013550 is a wasteful number, since it uses less digits than its factorization.

2101013550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 2101013550 is about 45836.8143526576. The cubic root of 2101013550 is about 1280.7851526472.

Adding to 2101013550 its reverse (553101012), we get a palindrome (2654114562).

The spelling of 2101013550 in words is "two billion, one hundred one million, thirteen thousand, five hundred fifty".