2531720706 has 32 divisors (see below), whose sum is σ = 5349507840. Its totient is φ = 797467776.

The previous prime is 2531720657. The next prime is 2531720707. The reversal of 2531720706 is 6070271352.

It is not an unprimeable number, because it can be changed into a prime (2531720707) 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 15 ways as a sum of consecutive naturals, for example, 146611 + ... + 162966.

It is an arithmetic number, because the mean of its divisors is an integer number (167172120).

Almost surely, 2^2531720706 is an apocalyptic number.

2531720706 is an abundant number, since it is smaller than the sum of its proper divisors (2817787134).

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

2531720706 is a wasteful number, since it uses less digits than its factorization.

2531720706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309658.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 2531720706 is about 50316.2071901291. The cubic root of 2531720706 is about 1362.9249163824.

The spelling of 2531720706 in words is "two billion, five hundred thirty-one million, seven hundred twenty thousand, seven hundred six".