2105415145 has 4 divisors (see below), whose sum is σ = 2526498180. Its totient is φ = 1684332112.

The previous prime is 2105415113. The next prime is 2105415161. The reversal of 2105415145 is 5415145012.

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 1432168336 + 673246809 = 37844^2 + 25947^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105415145 - 2⁵ = 2105415113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210541510 + ... + 210541519.

It is an arithmetic number, because the mean of its divisors is an integer number (631624545).

Almost surely, 2^2105415145 is an apocalyptic number.

It is an amenable number.

2105415145 is a deficient number, since it is larger than the sum of its proper divisors (421083035).

2105415145 is an equidigital number, since it uses as much as digits as its factorization.

2105415145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421083034.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 2105415145 is about 45884.8029853022. The cubic root of 2105415145 is about 1281.6789379780.

The spelling of 2105415145 in words is "two billion, one hundred five million, four hundred fifteen thousand, one hundred forty-five".