2105240115 has 32 divisors (see below), whose sum is σ = 3676856832. Its totient is φ = 1020096000.

The previous prime is 2105240089. The next prime is 2105240119. The reversal of 2105240115 is 5110425012.

It is not a de Polignac number, because 2105240115 - 2¹² = 2105236019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105240091 and 2105240100.

It is not an unprimeable number, because it can be changed into a prime (2105240119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378555 + ... + 384075.

It is an arithmetic number, because the mean of its divisors is an integer number (114901776).

Almost surely, 2^2105240115 is an apocalyptic number.

2105240115 is a deficient number, since it is larger than the sum of its proper divisors (1571616717).

2105240115 is a wasteful number, since it uses less digits than its factorization.

2105240115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2105240115 is about 45882.8956693014. The cubic root of 2105240115 is about 1281.6434202827.

Adding to 2105240115 its reverse (5110425012), we get a palindrome (7215665127).

The spelling of 2105240115 in words is "two billion, one hundred five million, two hundred forty thousand, one hundred fifteen".