2108531540 has 48 divisors (see below), whose sum is σ = 4537932672. Its totient is φ = 822704256.

The previous prime is 2108531519. The next prime is 2108531569. The reversal of 2108531540 is 451358012.

It is a super-4 number, since 4×2108531540⁴ (a number of 38 digits) contains 4444 as substring.

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, 130382 + ... + 145658.

It is an arithmetic number, because the mean of its divisors is an integer number (94540264).

Almost surely, 2^2108531540 is an apocalyptic number.

2108531540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2108531540 is an abundant number, since it is smaller than the sum of its proper divisors (2429401132).

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

2108531540 is a wasteful number, since it uses less digits than its factorization.

2108531540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15456 (or 15454 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 2108531540 is about 45918.7493296584. The cubic root of 2108531540 is about 1282.3109983963.

Adding to 2108531540 its reverse (451358012), we get a palindrome (2559889552).

It can be divided in two parts, 21085 and 31540, that added together give a palindrome (52625).

The spelling of 2108531540 in words is "two billion, one hundred eight million, five hundred thirty-one thousand, five hundred forty".