2981631 has 8 divisors (see below), whose sum is σ = 3991680. Its totient is φ = 1979672.

The previous prime is 2981597. The next prime is 2981653. The reversal of 2981631 is 1361892.

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 2981631 - 2¹¹ = 2979583 is a prime.

It is a super-2 number, since 2×2981631² = 17780246840322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981431) 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, 1101 + ... + 2678.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

2^2981631 is an apocalyptic number.

2981631 is a deficient number, since it is larger than the sum of its proper divisors (1010049).

2981631 is a wasteful number, since it uses less digits than its factorization.

2981631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4045.

The product of its digits is 2592, while the sum is 30.

The square root of 2981631 is about 1726.7399920081. The cubic root of 2981631 is about 143.9299910462.

The spelling of 2981631 in words is "two million, nine hundred eighty-one thousand, six hundred thirty-one".