2531385808 has 80 divisors (see below), whose sum is σ = 5997255040. Its totient is φ = 1010880000.

The previous prime is 2531385763. The next prime is 2531385809. The reversal of 2531385808 is 8085831352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531385809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120058 + ... + 139558.

It is an arithmetic number, because the mean of its divisors is an integer number (74965688).

Almost surely, 2^2531385808 is an apocalyptic number.

2531385808 is a gapful number since it is divisible by the number (28) 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 2531385808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2998627520).

2531385808 is an abundant number, since it is smaller than the sum of its proper divisors (3465869232).

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

2531385808 is a wasteful number, since it uses less digits than its factorization.

2531385808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19596 (or 19590 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 2531385808 is about 50312.8791463975. The cubic root of 2531385808 is about 1362.8648174735.

The spelling of 2531385808 in words is "two billion, five hundred thirty-one million, three hundred eighty-five thousand, eight hundred eight".