2101115551 has 8 divisors (see below), whose sum is σ = 2283046400. Its totient is φ = 1926319320.

The previous prime is 2101115543. The next prime is 2101115557. The reversal of 2101115551 is 1555111012.

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 2101115551 - 2³ = 2101115543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101115557) 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, 1783041 + ... + 1784218.

It is an arithmetic number, because the mean of its divisors is an integer number (285380800).

Almost surely, 2^2101115551 is an apocalyptic number.

2101115551 is a deficient number, since it is larger than the sum of its proper divisors (181930849).

2101115551 is a wasteful number, since it uses less digits than its factorization.

2101115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567309.

The product of its (nonzero) digits is 250, while the sum is 22.

The square root of 2101115551 is about 45837.9269928299. The cubic root of 2101115551 is about 1280.8058790330.

Adding to 2101115551 its reverse (1555111012), we get a palindrome (3656226563).

The spelling of 2101115551 in words is "two billion, one hundred one million, one hundred fifteen thousand, five hundred fifty-one".