2331540 has 36 divisors (see below), whose sum is σ = 7072884. Its totient is φ = 621696.

The previous prime is 2331463. The next prime is 2331557. The reversal of 2331540 is 451332.

It can be written as a sum of positive squares in 2 ways, for example, as 492804 + 1838736 = 702^2 + 1356^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a zygodrome in base 14.

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, 6297 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (196469).

2^2331540 is an apocalyptic number.

2331540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2331540 is an abundant number, since it is smaller than the sum of its proper divisors (4741344).

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

2331540 is a wasteful number, since it uses less digits than its factorization.

2331540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12968 (or 12963 counting only the distinct ones).

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

The square root of 2331540 is about 1526.9381126948. The cubic root of 2331540 is about 132.6012516688.

Adding to 2331540 its reverse (451332), we get a palindrome (2782872).

The spelling of 2331540 in words is "two million, three hundred thirty-one thousand, five hundred forty".