2145255500 has 48 divisors (see below), whose sum is σ = 4960859904. Its totient is φ = 807622400.

The previous prime is 2145255499. The next prime is 2145255569. The reversal of 2145255500 is 55525412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117692 + ... + 134691.

It is an arithmetic number, because the mean of its divisors is an integer number (103351248).

Almost surely, 2^2145255500 is an apocalyptic number.

2145255500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145255500 is an abundant number, since it is smaller than the sum of its proper divisors (2815604404).

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

2145255500 is a wasteful number, since it uses less digits than its factorization.

2145255500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252419 (or 252407 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 2145255500 is about 46316.9029620937. The cubic root of 2145255500 is about 1289.7127938621.

The spelling of 2145255500 in words is "two billion, one hundred forty-five million, two hundred fifty-five thousand, five hundred".