31145568 has 72 divisors (see below), whose sum is σ = 84234024. Its totient is φ = 10076160.

The previous prime is 31145561. The next prime is 31145593. The reversal of 31145568 is 86554113.

Its product of digits (14400) is a multiple of the sum of its prime factors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161280 + ... + 161472.

It is an arithmetic number, because the mean of its divisors is an integer number (1169917).

Almost surely, 2^31145568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31145568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42117012).

31145568 is an abundant number, since it is smaller than the sum of its proper divisors (53088456).

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

31145568 is a wasteful number, since it uses less digits than its factorization.

31145568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 239 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 31145568 is about 5580.8214449129. The cubic root of 31145568 is about 314.6290013648.

It can be divided in two parts, 31145 and 568, that added together give a palindrome (31713).

The spelling of 31145568 in words is "thirty-one million, one hundred forty-five thousand, five hundred sixty-eight".