2531320 has 48 divisors (see below), whose sum is σ = 6272280. Its totient is φ = 918720.

The previous prime is 2531293. The next prime is 2531369. The reversal of 2531320 is 231352.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2531294 and 2531303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4579 + ... + 5101.

2^2531320 is an apocalyptic number.

2531320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2531320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3136140).

2531320 is an abundant number, since it is smaller than the sum of its proper divisors (3740960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531320 is a wasteful number, since it uses less digits than its factorization.

2531320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 2531320 is about 1591.0122563953. The cubic root of 2531320 is about 136.2853007317.

Adding to 2531320 its reverse (231352), we get a palindrome (2762672).

Subtracting from 2531320 its reverse (231352), we obtain a cube (2299968 = 132³).

The spelling of 2531320 in words is "two million, five hundred thirty-one thousand, three hundred twenty".