2531666040 has 32 divisors (see below), whose sum is σ = 7594998480. Its totient is φ = 675110912.

The previous prime is 2531666029. The next prime is 2531666161. The reversal of 2531666040 is 406661352.

It is a junction number, because it is equal to n+sod(n) for n = 2531665992 and 2531666010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10548489 + ... + 10548728.

Almost surely, 2^2531666040 is an apocalyptic number.

2531666040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531666040 is an abundant number, since it is smaller than the sum of its proper divisors (5063332440).

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

2531666040 is a wasteful number, since it uses less digits than its factorization.

2531666040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21097231 (or 21097227 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2531666040 is about 50315.6639626270. The cubic root of 2531666040 is about 1362.9151066919.

The spelling of 2531666040 in words is "two billion, five hundred thirty-one million, six hundred sixty-six thousand, forty".