2511491 has 4 divisors (see below), whose sum is σ = 2539800. Its totient is φ = 2483184.

The previous prime is 2511473. The next prime is 2511493. The reversal of 2511491 is 1941152.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2511491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2511493) 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, 14021 + ... + 14198.

It is an arithmetic number, because the mean of its divisors is an integer number (634950).

2^2511491 is an apocalyptic number.

2511491 is a deficient number, since it is larger than the sum of its proper divisors (28309).

2511491 is an equidigital number, since it uses as much as digits as its factorization.

2511491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28308.

The product of its digits is 360, while the sum is 23.

The square root of 2511491 is about 1584.7684373434. The cubic root of 2511491 is about 135.9285055307.

The spelling of 2511491 in words is "two million, five hundred eleven thousand, four hundred ninety-one".