2531340 has 144 divisors (see below), whose sum is σ = 9172800. Its totient is φ = 564480.

The previous prime is 2531293. The next prime is 2531369. The reversal of 2531340 is 431352.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61720 + ... + 61760.

It is an arithmetic number, because the mean of its divisors is an integer number (63700).

2^2531340 is an apocalyptic number.

2531340 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 2531340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4586400).

2531340 is an abundant number, since it is smaller than the sum of its proper divisors (6641460).

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

2531340 is a wasteful number, since it uses less digits than its factorization.

2531340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 2531340 is about 1591.0185416896. The cubic root of 2531340 is about 136.2856596616.

Adding to 2531340 its reverse (431352), we get a palindrome (2962692).

The spelling of 2531340 in words is "two million, five hundred thirty-one thousand, three hundred forty".