2125511155 has 8 divisors (see below), whose sum is σ = 2551633200. Its totient is φ = 1699729056.

The previous prime is 2125511147. The next prime is 2125511159. The reversal of 2125511155 is 5511155212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2125511155 - 2³ = 2125511147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125511159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71020 + ... + 96409.

It is an arithmetic number, because the mean of its divisors is an integer number (318954150).

Almost surely, 2^2125511155 is an apocalyptic number.

2125511155 is a deficient number, since it is larger than the sum of its proper divisors (426122045).

2125511155 is a wasteful number, since it uses less digits than its factorization.

2125511155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169973.

The product of its digits is 2500, while the sum is 28.

The square root of 2125511155 is about 46103.2662075042. The cubic root of 2125511155 is about 1285.7438712563.

Adding to 2125511155 its reverse (5511155212), we get a palindrome (7636666367).

The spelling of 2125511155 in words is "two billion, one hundred twenty-five million, five hundred eleven thousand, one hundred fifty-five".