2152566818 has 32 divisors (see below), whose sum is σ = 3427522560. Its totient is φ = 1012213440.

The previous prime is 2152566817. The next prime is 2152566851. The reversal of 2152566818 is 8186652512.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2152566817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606128 + ... + 609668.

It is an arithmetic number, because the mean of its divisors is an integer number (107110080).

Almost surely, 2^2152566818 is an apocalyptic number.

2152566818 is a deficient number, since it is larger than the sum of its proper divisors (1274955742).

2152566818 is a wasteful number, since it uses less digits than its factorization.

2152566818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842.

The product of its digits is 230400, while the sum is 44.

The square root of 2152566818 is about 46395.7629315437. The cubic root of 2152566818 is about 1291.1763038058.

The spelling of 2152566818 in words is "two billion, one hundred fifty-two million, five hundred sixty-six thousand, eight hundred eighteen".