31117482 has 48 divisors (see below), whose sum is σ = 76759488. Its totient is φ = 9018240.

The previous prime is 31117477. The next prime is 31117487. The reversal of 31117482 is 28471113.

It is an interprime number because it is at equal distance from previous prime (31117477) and next prime (31117487).

It is not an unprimeable number, because it can be changed into a prime (31117487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1138 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (1599156).

Almost surely, 2^31117482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31117482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38379744).

31117482 is an abundant number, since it is smaller than the sum of its proper divisors (45642006).

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

31117482 is a wasteful number, since it uses less digits than its factorization.

31117482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875 (or 6872 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 31117482 is about 5578.3045811429. The cubic root of 31117482 is about 314.5343990588.

Adding to 31117482 its reverse (28471113), we get a palindrome (59588595).

The spelling of 31117482 in words is "thirty-one million, one hundred seventeen thousand, four hundred eighty-two".