2101265280 has 512 divisors, whose sum is σ = 8248780800. Its totient is φ = 502824960.

The previous prime is 2101265273. The next prime is 2101265291. The reversal of 2101265280 is 825621012.

It is a happy number.

2101265280 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 2 + 652 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6756325 + ... + 6756635.

It is an arithmetic number, because the mean of its divisors is an integer number (16110900).

Almost surely, 2^2101265280 is an apocalyptic number.

2101265280 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 2101265280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4124390400).

2101265280 is an abundant number, since it is smaller than the sum of its proper divisors (6147515520).

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

2101265280 is a wasteful number, since it uses less digits than its factorization.

2101265280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2101265280 is about 45839.5602073144. The cubic root of 2101265280 is about 1280.8363024317.

Adding to 2101265280 its reverse (825621012), we get a palindrome (2926886292).

The spelling of 2101265280 in words is "two billion, one hundred one million, two hundred sixty-five thousand, two hundred eighty".