2106154511 has 4 divisors (see below), whose sum is σ = 2112927024. Its totient is φ = 2099382000.

The previous prime is 2106154499. The next prime is 2106154513. The reversal of 2106154511 is 1154516012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2106154511 - 2¹⁰ = 2106153487 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 (2106154513) 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, 3385790 + ... + 3386411.

It is an arithmetic number, because the mean of its divisors is an integer number (528231756).

Almost surely, 2^2106154511 is an apocalyptic number.

2106154511 is a deficient number, since it is larger than the sum of its proper divisors (6772513).

2106154511 is an equidigital number, since it uses as much as digits as its factorization.

2106154511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772512.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 2106154511 is about 45892.8590414674. The cubic root of 2106154511 is about 1281.8289509776.

The spelling of 2106154511 in words is "two billion, one hundred six million, one hundred fifty-four thousand, five hundred eleven".