31230560 has 48 divisors (see below), whose sum is σ = 75370176. Its totient is φ = 12223488.

The previous prime is 31230559. The next prime is 31230587. The reversal of 31230560 is 6503213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5444 + ... + 9596.

It is an arithmetic number, because the mean of its divisors is an integer number (1570212).

Almost surely, 2^31230560 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 31230560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37685088).

31230560 is an abundant number, since it is smaller than the sum of its proper divisors (44139616).

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

31230560 is a wasteful number, since it uses less digits than its factorization.

31230560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215 (or 4207 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 31230560 is about 5588.4309067931. The cubic root of 31230560 is about 314.9149346182.

Adding to 31230560 its reverse (6503213), we get a palindrome (37733773).

The spelling of 31230560 in words is "thirty-one million, two hundred thirty thousand, five hundred sixty".