2151824 has 10 divisors (see below), whose sum is σ = 4169190. Its totient is φ = 1075904.

The previous prime is 2151817. The next prime is 2151827. The reversal of 2151824 is 4281512.

It can be written as a sum of positive squares in only one way, i.e., 2016400 + 135424 = 1420^2 + 368^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2151824.

It is not an unprimeable number, because it can be changed into a prime (2151827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67229 + ... + 67260.

It is an arithmetic number, because the mean of its divisors is an integer number (416919).

2^2151824 is an apocalyptic number.

It is an amenable number.

2151824 is a deficient number, since it is larger than the sum of its proper divisors (2017366).

2151824 is a wasteful number, since it uses less digits than its factorization.

2151824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134497 (or 134491 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 2151824 is about 1466.9096768377. The cubic root of 2151824 is about 129.1027764964.

The spelling of 2151824 in words is "two million, one hundred fifty-one thousand, eight hundred twenty-four".