31442168 has 8 divisors (see below), whose sum is σ = 58954080. Its totient is φ = 15721080.

The previous prime is 31442161. The next prime is 31442189. The reversal of 31442168 is 86124413.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 31442168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965128 + ... + 1965143.

It is an arithmetic number, because the mean of its divisors is an integer number (7369260).

Almost surely, 2^31442168 is an apocalyptic number.

It is an amenable number.

31442168 is a deficient number, since it is larger than the sum of its proper divisors (27511912).

31442168 is a wasteful number, since it uses less digits than its factorization.

31442168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930277 (or 3930273 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 31442168 is about 5607.3316292155. The cubic root of 31442168 is about 315.6245875628.

The spelling of 31442168 in words is "thirty-one million, four hundred forty-two thousand, one hundred sixty-eight".