31134320 has 80 divisors (see below), whose sum is σ = 84369600. Its totient is φ = 10463232.

The previous prime is 31134289. The next prime is 31134347. The reversal of 31134320 is 2343113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29156 + ... + 30204.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^31134320 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 31134320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42184800).

31134320 is an abundant number, since it is smaller than the sum of its proper divisors (53235280).

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

31134320 is a wasteful number, since it uses less digits than its factorization.

31134320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31134320 is about 5579.8136169589. The cubic root of 31134320 is about 314.5911214636.

Adding to 31134320 its reverse (2343113), we get a palindrome (33477433).

The spelling of 31134320 in words is "thirty-one million, one hundred thirty-four thousand, three hundred twenty".