2531505 has 16 divisors (see below), whose sum is σ = 4109184. Its totient is φ = 1330560.

The previous prime is 2531489. The next prime is 2531519. The reversal of 2531505 is 5051352.

It is not a de Polignac number, because 2531505 - 2⁴ = 2531489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (256824).

2^2531505 is an apocalyptic number.

It is an amenable number.

2531505 is a deficient number, since it is larger than the sum of its proper divisors (1577679).

2531505 is a wasteful number, since it uses less digits than its factorization.

2531505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 2531505 is about 1591.0703944201. The cubic root of 2531505 is about 136.2886207606.

Adding to 2531505 its reverse (5051352), we get a palindrome (7582857).

The spelling of 2531505 in words is "two million, five hundred thirty-one thousand, five hundred five".