2145559105 has 4 divisors (see below), whose sum is σ = 2574670932. Its totient is φ = 1716447280.

The previous prime is 2145559093. The next prime is 2145559109. The reversal of 2145559105 is 5019555412.

It is a happy number.

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 1699335729 + 446223376 = 41223^2 + 21124^2 .

It is not a de Polignac number, because 2145559105 - 2²⁷ = 2011341377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145559109) 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, 214555906 + ... + 214555915.

It is an arithmetic number, because the mean of its divisors is an integer number (643667733).

Almost surely, 2^2145559105 is an apocalyptic number.

It is an amenable number.

2145559105 is a deficient number, since it is larger than the sum of its proper divisors (429111827).

2145559105 is an equidigital number, since it uses as much as digits as its factorization.

2145559105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429111826.

The product of its (nonzero) digits is 45000, while the sum is 37.

The square root of 2145559105 is about 46320.1803213243. The cubic root of 2145559105 is about 1289.7736327353.

The spelling of 2145559105 in words is "two billion, one hundred forty-five million, five hundred fifty-nine thousand, one hundred five".