31126560 has 96 divisors (see below), whose sum is σ = 103239360. Its totient is φ = 7861248.

The previous prime is 31126559. The next prime is 31126597. The reversal of 31126560 is 6562113.

31126560 is nontrivially palindromic in base 9.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31126560.

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, 7414 + ... + 10826.

It is an arithmetic number, because the mean of its divisors is an integer number (1075410).

Almost surely, 2^31126560 is an apocalyptic number.

31126560 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 31126560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51619680).

31126560 is an abundant number, since it is smaller than the sum of its proper divisors (72112800).

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

31126560 is a wasteful number, since it uses less digits than its factorization.

31126560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450 (or 3442 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 31126560 is about 5579.1182098966. The cubic root of 31126560 is about 314.5649827851.

Adding to 31126560 its reverse (6562113), we get a palindrome (37688673).

The spelling of 31126560 in words is "thirty-one million, one hundred twenty-six thousand, five hundred sixty".