2101335525 has 72 divisors (see below), whose sum is σ = 3841718400. Its totient is φ = 1097712000.

The previous prime is 2101335521. The next prime is 2101335569. The reversal of 2101335525 is 5255331012.

It is a happy number.

2101335525 is a `hidden beast` number, since 2 + 1 + 0 + 133 + 5 + 525 = 666.

It is not a de Polignac number, because 2101335525 - 2² = 2101335521 is a prime.

It is a super-2 number, since 2×2101335525² = 8831221977254051250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101335521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3178695 + ... + 3179355.

It is an arithmetic number, because the mean of its divisors is an integer number (53357200).

Almost surely, 2^2101335525 is an apocalyptic number.

2101335525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101335525 is a deficient number, since it is larger than the sum of its proper divisors (1740382875).

2101335525 is a wasteful number, since it uses less digits than its factorization.

2101335525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 2101335525 is about 45840.3264059060. The cubic root of 2101335525 is about 1280.8505749979.

Adding to 2101335525 its reverse (5255331012), we get a palindrome (7356666537).

The spelling of 2101335525 in words is "two billion, one hundred one million, three hundred thirty-five thousand, five hundred twenty-five".