2109519 has 12 divisors (see below), whose sum is σ = 3145792. Its totient is φ = 1360800.

The previous prime is 2109509. The next prime is 2109521. The reversal of 2109519 is 9159012.

It is a happy number.

It is not a de Polignac number, because 2109519 - 2⁷ = 2109391 is a prime.

It is a super-2 number, since 2×2109519² = 8900140822722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2109492 and 2109501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3502 + ... + 4059.

2^2109519 is an apocalyptic number.

2109519 is a deficient number, since it is larger than the sum of its proper divisors (1036273).

2109519 is a wasteful number, since it uses less digits than its factorization.

2109519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7598 (or 7595 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 2109519 is about 1452.4183281686. The cubic root of 2109519 is about 128.2511142933.

It can be divided in two parts, 2109 and 519, that added together give a triangular number (2628 = T₇₂).

The spelling of 2109519 in words is "two million, one hundred nine thousand, five hundred nineteen".