2151743812 has 6 divisors (see below), whose sum is σ = 3765551678. Its totient is φ = 1075871904.

The previous prime is 2151743807. The next prime is 2151743819. The reversal of 2151743812 is 2183471512.

It can be written as a sum of positive squares in only one way, i.e., 1633453056 + 518290756 = 40416^2 + 22766^2 .

It is not an unprimeable number, because it can be changed into a prime (2151743819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268967973 + ... + 268967980.

Almost surely, 2^2151743812 is an apocalyptic number.

It is an amenable number.

2151743812 is a deficient number, since it is larger than the sum of its proper divisors (1613807866).

2151743812 is a wasteful number, since it uses less digits than its factorization.

2151743812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537935957 (or 537935955 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 2151743812 is about 46386.8926745476. The cubic root of 2151743812 is about 1291.0117279926.

The spelling of 2151743812 in words is "two billion, one hundred fifty-one million, seven hundred forty-three thousand, eight hundred twelve".