2531020720 has 40 divisors (see below), whose sum is σ = 5899823280. Its totient is φ = 1009793280.

The previous prime is 2531020649. The next prime is 2531020727. The reversal of 2531020720 is 270201352.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2531020691 and 2531020700.

It is not an unprimeable number, because it can be changed into a prime (2531020727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9546 + ... + 71785.

It is an arithmetic number, because the mean of its divisors is an integer number (147495582).

Almost surely, 2^2531020720 is an apocalyptic number.

2531020720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531020720 is an abundant number, since it is smaller than the sum of its proper divisors (3368802560).

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

2531020720 is a wasteful number, since it uses less digits than its factorization.

2531020720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81733 (or 81727 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2531020720 is about 50309.2508391846. The cubic root of 2531020720 is about 1362.7992947980.

The spelling of 2531020720 in words is "two billion, five hundred thirty-one million, twenty thousand, seven hundred twenty".