2531020730 has 64 divisors (see below), whose sum is σ = 5386493952. Its totient is φ = 837933120.

The previous prime is 2531020727. The next prime is 2531020753. The reversal of 2531020730 is 370201352.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2531020696 and 2531020705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1272797 + ... + 1274783.

It is an arithmetic number, because the mean of its divisors is an integer number (84163968).

Almost surely, 2^2531020730 is an apocalyptic number.

2531020730 is an abundant number, since it is smaller than the sum of its proper divisors (2855473222).

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

2531020730 is a wasteful number, since it uses less digits than its factorization.

2531020730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 2531020730 is about 50309.2509385699. The cubic root of 2531020730 is about 1362.7992965928.

The spelling of 2531020730 in words is "two billion, five hundred thirty-one million, twenty thousand, seven hundred thirty".