2145517312 has 18 divisors (see below), whose sum is σ = 4282654208. Its totient is φ = 1072758528.

The previous prime is 2145517291. The next prime is 2145517321. The reversal of 2145517312 is 2137155412.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4190208 + ... + 4190719.

Almost surely, 2^2145517312 is an apocalyptic number.

It is an amenable number.

2145517312 is a deficient number, since it is larger than the sum of its proper divisors (2137136896).

2145517312 is an frugal number, since it uses more digits than its factorization.

2145517312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8380943 (or 8380929 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 2145517312 is about 46319.7291874640. The cubic root of 2145517312 is about 1289.7652582500.

The spelling of 2145517312 in words is "two billion, one hundred forty-five million, five hundred seventeen thousand, three hundred twelve".