2145512836 has 12 divisors (see below), whose sum is σ = 3789094540. Its totient is φ = 1062914400.

The previous prime is 2145512827. The next prime is 2145512839. The reversal of 2145512836 is 6382155412.

It can be written as a sum of positive squares in 2 ways, for example, as 1287374400 + 858138436 = 35880^2 + 29294^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2145512795 and 2145512804.

It is not an unprimeable number, because it can be changed into a prime (2145512839) 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 3 ways as a sum of consecutive naturals, for example, 2460015 + ... + 2460886.

Almost surely, 2^2145512836 is an apocalyptic number.

It is an amenable number.

2145512836 is a deficient number, since it is larger than the sum of its proper divisors (1643581704).

2145512836 is a wasteful number, since it uses less digits than its factorization.

2145512836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921014 (or 4921012 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 2145512836 is about 46319.6808710941. The cubic root of 2145512836 is about 1289.7643613423.

The spelling of 2145512836 in words is "two billion, one hundred forty-five million, five hundred twelve thousand, eight hundred thirty-six".