2145909000 has 64 divisors (see below), whose sum is σ = 6695245440. Its totient is φ = 572241600.

The previous prime is 2145908987. The next prime is 2145909037. The reversal of 2145909000 is 9095412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 354652 + ... + 360651.

It is an arithmetic number, because the mean of its divisors is an integer number (104613210).

Almost surely, 2^2145909000 is an apocalyptic number.

2145909000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145909000 is an abundant number, since it is smaller than the sum of its proper divisors (4549336440).

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

2145909000 is a wasteful number, since it uses less digits than its factorization.

2145909000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715327 (or 715313 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2145909000 is about 46323.9570848605. The cubic root of 2145909000 is about 1289.8437404623.

The spelling of 2145909000 in words is "two billion, one hundred forty-five million, nine hundred nine thousand".