2151768 has 16 divisors (see below), whose sum is σ = 5379480. Its totient is φ = 717248.

The previous prime is 2151767. The next prime is 2151781. The reversal of 2151768 is 8671512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44805 + ... + 44852.

2^2151768 is an apocalyptic number.

It is an amenable number.

2151768 is an abundant number, since it is smaller than the sum of its proper divisors (3227712).

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

2151768 is a wasteful number, since it uses less digits than its factorization.

2151768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89666 (or 89662 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 2151768 is about 1466.8905889670. The cubic root of 2151768 is about 129.1016565445.

The spelling of 2151768 in words is "two million, one hundred fifty-one thousand, seven hundred sixty-eight".