31054320 has 160 divisors (see below), whose sum is σ = 116778240. Its totient is φ = 7522560.

The previous prime is 31054297. The next prime is 31054333. The reversal of 31054320 is 2345013.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31054293 and 31054302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23107 + ... + 24413.

It is an arithmetic number, because the mean of its divisors is an integer number (729864).

Almost surely, 2^31054320 is an apocalyptic number.

31054320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31054320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58389120).

31054320 is an abundant number, since it is smaller than the sum of its proper divisors (85723920).

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

31054320 is a wasteful number, since it uses less digits than its factorization.

31054320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 31054320 is about 5572.6403077895. The cubic root of 31054320 is about 314.3214418258.

Adding to 31054320 its reverse (2345013), we get a palindrome (33399333).

The spelling of 31054320 in words is "thirty-one million, fifty-four thousand, three hundred twenty".