2101536 has 36 divisors (see below), whose sum is σ = 5977062. Its totient is φ = 700416.

The previous prime is 2101531. The next prime is 2101549. The reversal of 2101536 is 6351012.

It can be written as a sum of positive squares in only one way, i.e., 1904400 + 197136 = 1380^2 + 444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2101531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3361 + ... + 3936.

2^2101536 is an apocalyptic number.

It is an amenable number.

2101536 is an abundant number, since it is smaller than the sum of its proper divisors (3875526).

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

2101536 is a wasteful number, since it uses less digits than its factorization.

2101536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313 (or 7302 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2101536 is about 1449.6675480951. The cubic root of 2101536 is about 128.0891306293.

Adding to 2101536 its reverse (6351012), we get a palindrome (8452548).

The spelling of 2101536 in words is "two million, one hundred one thousand, five hundred thirty-six".