2154535105 has 4 divisors (see below), whose sum is σ = 2585442132. Its totient is φ = 1723628080.

The previous prime is 2154535099. The next prime is 2154535109. The reversal of 2154535105 is 5015354512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 245893761 + 1908641344 = 15681^2 + 43688^2 .

It is not a de Polignac number, because 2154535105 - 2⁵ = 2154535073 is a prime.

It is a super-2 number, since 2×2154535105² = 9284043037354722050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154535109) 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, 215453506 + ... + 215453515.

It is an arithmetic number, because the mean of its divisors is an integer number (646360533).

Almost surely, 2^2154535105 is an apocalyptic number.

It is an amenable number.

2154535105 is a deficient number, since it is larger than the sum of its proper divisors (430907027).

2154535105 is an equidigital number, since it uses as much as digits as its factorization.

2154535105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430907026.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 2154535105 is about 46416.9700109777. The cubic root of 2154535105 is about 1291.5697304338.

Adding to 2154535105 its reverse (5015354512), we get a palindrome (7169889617).

The spelling of 2154535105 in words is "two billion, one hundred fifty-four million, five hundred thirty-five thousand, one hundred five".