31068631 has 4 divisors (see below), whose sum is σ = 33893064. Its totient is φ = 28244200.

The previous prime is 31068619. The next prime is 31068647. The reversal of 31068631 is 13686013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13686013 = 11 ⋅1244183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31068631 is a prime.

It is a super-4 number, since 4×31068631⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31068631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31068601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1412200 + ... + 1412221.

It is an arithmetic number, because the mean of its divisors is an integer number (8473266).

Almost surely, 2^31068631 is an apocalyptic number.

31068631 is a deficient number, since it is larger than the sum of its proper divisors (2824433).

31068631 is a wasteful number, since it uses less digits than its factorization.

31068631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824432.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 31068631 is about 5573.9242011351. The cubic root of 31068631 is about 314.3697181295.

The spelling of 31068631 in words is "thirty-one million, sixty-eight thousand, six hundred thirty-one".