2631287081 has 8 divisors (see below), whose sum is σ = 2786516640. Its totient is φ = 2476107328.

The previous prime is 2631287077. The next prime is 2631287083. The reversal of 2631287081 is 1807821362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2631287081 - 2² = 2631287077 is a prime.

It is a super-2 number, since 2×2631287081² = 13847343405275001122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631287083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201530 + ... + 214188.

It is an arithmetic number, because the mean of its divisors is an integer number (348314580).

Almost surely, 2^2631287081 is an apocalyptic number.

It is an amenable number.

2631287081 is a deficient number, since it is larger than the sum of its proper divisors (155229559).

2631287081 is a wasteful number, since it uses less digits than its factorization.

2631287081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24903.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 2631287081 is about 51296.0727639066. The cubic root of 2631287081 is about 1380.5625167720.

The spelling of 2631287081 in words is "two billion, six hundred thirty-one million, two hundred eighty-seven thousand, eighty-one".