2515791 has 4 divisors (see below), whose sum is σ = 3354392. Its totient is φ = 1677192.

The previous prime is 2515787. The next prime is 2515817. The reversal of 2515791 is 1975152.

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

It is not a de Polignac number, because 2515791 - 2² = 2515787 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2515291) 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, 419296 + ... + 419301.

It is an arithmetic number, because the mean of its divisors is an integer number (838598).

2^2515791 is an apocalyptic number.

2515791 is a deficient number, since it is larger than the sum of its proper divisors (838601).

2515791 is an equidigital number, since it uses as much as digits as its factorization.

2515791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838600.

The product of its digits is 3150, while the sum is 30.

The square root of 2515791 is about 1586.1245222239. The cubic root of 2515791 is about 136.0060370734.

It can be divided in two parts, 251 and 5791, that multiplied together give a palindrome (1453541).

The spelling of 2515791 in words is "two million, five hundred fifteen thousand, seven hundred ninety-one".