31000084 has 6 divisors (see below), whose sum is σ = 54250154. Its totient is φ = 15500040.

The previous prime is 31000063. The next prime is 31000087. The reversal of 31000084 is 48000013.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 13527684 = 4180^2 + 3678^2 .

It is a super-2 number, since 2×31000084² = 1922010416014112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875007 + ... + 3875014.

Almost surely, 2^31000084 is an apocalyptic number.

It is an amenable number.

31000084 is a deficient number, since it is larger than the sum of its proper divisors (23250070).

31000084 is a wasteful number, since it uses less digits than its factorization.

31000084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7750025 (or 7750023 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31000084 is about 5567.7719062476. The cubic root of 31000084 is about 314.1383489765.

Adding to 31000084 its reverse (48000013), we get a palindrome (79000097).

The spelling of 31000084 in words is "thirty-one million, eighty-four", and thus it is an aban number.