2123515 has 8 divisors (see below), whose sum is σ = 2560320. Its totient is φ = 1690752.

The previous prime is 2123491. The next prime is 2123557. The reversal of 2123515 is 5153212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123515 - 2⁵ = 2123483 is a prime.

2123515 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2123492 and 2123501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (320040).

2^2123515 is an apocalyptic number.

2123515 is a deficient number, since it is larger than the sum of its proper divisors (436805).

2123515 is a wasteful number, since it uses less digits than its factorization.

2123515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021.

The product of its digits is 300, while the sum is 19.

The square root of 2123515 is about 1457.2285338958. The cubic root of 2123515 is about 128.5341246862.

Adding to 2123515 its reverse (5153212), we get a palindrome (7276727).

The spelling of 2123515 in words is "two million, one hundred twenty-three thousand, five hundred fifteen".