2145230772 has 12 divisors (see below), whose sum is σ = 5005538496. Its totient is φ = 715076920.

The previous prime is 2145230761. The next prime is 2145230819. The reversal of 2145230772 is 2770325412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89384604 + ... + 89384627.

It is an arithmetic number, because the mean of its divisors is an integer number (417128208).

Almost surely, 2^2145230772 is an apocalyptic number.

It is an amenable number.

2145230772 is an abundant number, since it is smaller than the sum of its proper divisors (2860307724).

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

2145230772 is a wasteful number, since it uses less digits than its factorization.

2145230772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178769238 (or 178769236 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 2145230772 is about 46316.6360177420. The cubic root of 2145230772 is about 1289.7078384087.

The spelling of 2145230772 in words is "two billion, one hundred forty-five million, two hundred thirty thousand, seven hundred seventy-two".