2531217 has 16 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 1518720.

The previous prime is 2531209. The next prime is 2531233. The reversal of 2531217 is 7121352.

It is not a de Polignac number, because 2531217 - 2³ = 2531209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2531193 and 2531202.

It is not an unprimeable number, because it can be changed into a prime (2531267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808 + ... + 2390.

It is an arithmetic number, because the mean of its divisors is an integer number (232848).

2^2531217 is an apocalyptic number.

It is an amenable number.

2531217 is a deficient number, since it is larger than the sum of its proper divisors (1194351).

2531217 is a wasteful number, since it uses less digits than its factorization.

2531217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its digits is 420, while the sum is 21.

The square root of 2531217 is about 1590.9798867365. The cubic root of 2531217 is about 136.2834522131.

Adding to 2531217 its reverse (7121352), we get a palindrome (9652569).

The spelling of 2531217 in words is "two million, five hundred thirty-one thousand, two hundred seventeen".