31142166 has 48 divisors (see below), whose sum is σ = 70352064. Its totient is φ = 9114000.

The previous prime is 31142129. The next prime is 31142179. The reversal of 31142166 is 66124113.

It is a congruent number.

It is an unprimeable number.

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, 63181 + ... + 63671.

It is an arithmetic number, because the mean of its divisors is an integer number (1465668).

Almost surely, 2^31142166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31142166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35176032).

31142166 is an abundant number, since it is smaller than the sum of its proper divisors (39209898).

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

31142166 is a wasteful number, since it uses less digits than its factorization.

31142166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 538 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 31142166 is about 5580.5166427491. The cubic root of 31142166 is about 314.6175454081.

Adding to 31142166 its reverse (66124113), we get a palindrome (97266279).

The spelling of 31142166 in words is "thirty-one million, one hundred forty-two thousand, one hundred sixty-six".