2051915 has 4 divisors (see below), whose sum is σ = 2462304. Its totient is φ = 1641528.

The previous prime is 2051893. The next prime is 2051923. The reversal of 2051915 is 5191502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2051915 - 2⁶ = 2051851 is a prime.

It is a Duffinian number.

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, 205187 + ... + 205196.

It is an arithmetic number, because the mean of its divisors is an integer number (615576).

2^2051915 is an apocalyptic number.

2051915 is a deficient number, since it is larger than the sum of its proper divisors (410389).

2051915 is an equidigital number, since it uses as much as digits as its factorization.

2051915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410388.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 2051915 is about 1432.4506972318. The cubic root of 2051915 is about 127.0729528981.

The spelling of 2051915 in words is "two million, fifty-one thousand, nine hundred fifteen".