2051065500 has 192 divisors, whose sum is σ = 6559128576. Its totient is φ = 493920000.

The previous prime is 2051065483. The next prime is 2051065501. The reversal of 2051065500 is 55601502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051065501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3250185 + ... + 3250815.

It is an arithmetic number, because the mean of its divisors is an integer number (34162128).

Almost surely, 2^2051065500 is an apocalyptic number.

2051065500 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 2051065500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3279564288).

2051065500 is an abundant number, since it is smaller than the sum of its proper divisors (4508063076).

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

2051065500 is a wasteful number, since it uses less digits than its factorization.

2051065500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2051065500 is about 45288.6906412627. The cubic root of 2051065500 is about 1270.5541426164.

The spelling of 2051065500 in words is "two billion, fifty-one million, sixty-five thousand, five hundred".