2531215 has 16 divisors (see below), whose sum is σ = 3259872. Its totient is φ = 1880064.

The previous prime is 2531209. The next prime is 2531233. The reversal of 2531215 is 5121352.

It is not a de Polignac number, because 2531215 - 2⁵ = 2531183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2531192 and 2531201.

It is a congruent number.

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, 8092 + ... + 8398.

It is an arithmetic number, because the mean of its divisors is an integer number (203742).

2^2531215 is an apocalyptic number.

2531215 is a deficient number, since it is larger than the sum of its proper divisors (728657).

2531215 is a wasteful number, since it uses less digits than its factorization.

2531215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its digits is 300, while the sum is 19.

The square root of 2531215 is about 1590.9792581929. The cubic root of 2531215 is about 136.2834163191.

Adding to 2531215 its reverse (5121352), we get a palindrome (7652567).

The spelling of 2531215 in words is "two million, five hundred thirty-one thousand, two hundred fifteen".