2045217500 has 60 divisors (see below), whose sum is σ = 4667068560. Its totient is φ = 782496000.

The previous prime is 2045217479. The next prime is 2045217509. The reversal of 2045217500 is 57125402.

It is a self number, because there is not a number n which added to its sum of digits gives 2045217500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045217509) 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 19 ways as a sum of consecutive naturals, for example, 39716 + ... + 75284.

It is an arithmetic number, because the mean of its divisors is an integer number (77784476).

Almost surely, 2^2045217500 is an apocalyptic number.

2045217500 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 2045217500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2333534280).

2045217500 is an abundant number, since it is smaller than the sum of its proper divisors (2621851060).

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

2045217500 is a wasteful number, since it uses less digits than its factorization.

2045217500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35616 (or 35599 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 2045217500 is about 45224.0809746312. The cubic root of 2045217500 is about 1269.3454580736.

The spelling of 2045217500 in words is "two billion, forty-five million, two hundred seventeen thousand, five hundred".