2153952868 has 12 divisors (see below), whose sum is σ = 3781310652. Its totient is φ = 1073578400.

The previous prime is 2153952859. The next prime is 2153952869. The reversal of 2153952868 is 8682593512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 877462884 + 1276489984 = 29622^2 + 35728^2 .

It is not an unprimeable number, because it can be changed into a prime (2153952869) 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, 848083 + ... + 850618.

It is an arithmetic number, because the mean of its divisors is an integer number (315109221).

Almost surely, 2^2153952868 is an apocalyptic number.

It is an amenable number.

2153952868 is a deficient number, since it is larger than the sum of its proper divisors (1627357784).

2153952868 is a wasteful number, since it uses less digits than its factorization.

2153952868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699022 (or 1699020 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 2153952868 is about 46410.6977754052. The cubic root of 2153952868 is about 1291.4533762633.

The spelling of 2153952868 in words is "two billion, one hundred fifty-three million, nine hundred fifty-two thousand, eight hundred sixty-eight".