2531000320 has 76 divisors (see below), whose sum is σ = 6077534904. Its totient is φ = 1011875840.

The previous prime is 2531000291. The next prime is 2531000321. The reversal of 2531000320 is 230001352.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2531000294 and 2531000303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531000321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309755 + ... + 1311685.

Almost surely, 2^2531000320 is an apocalyptic number.

2531000320 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 2531000320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038767452).

2531000320 is an abundant number, since it is smaller than the sum of its proper divisors (3546534584).

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

2531000320 is an frugal number, since it uses more digits than its factorization.

2531000320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 1938 counting only the distinct ones).

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

The square root of 2531000320 is about 50309.0480927636. The cubic root of 2531000320 is about 1362.7956334055.

Adding to 2531000320 its reverse (230001352), we get a palindrome (2761001672).

The spelling of 2531000320 in words is "two billion, five hundred thirty-one million, three hundred twenty", and thus it is an aban number.