31130255 has 8 divisors (see below), whose sum is σ = 40229952. Its totient is φ = 22988448.

The previous prime is 31130251. The next prime is 31130261. The reversal of 31130255 is 55203113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31130255 - 2² = 31130251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239399 + ... + 239528.

It is an arithmetic number, because the mean of its divisors is an integer number (5028744).

Almost surely, 2^31130255 is an apocalyptic number.

31130255 is a deficient number, since it is larger than the sum of its proper divisors (9099697).

31130255 is a wasteful number, since it uses less digits than its factorization.

31130255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478945.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 31130255 is about 5579.4493455896. The cubic root of 31130255 is about 314.5774295146.

Adding to 31130255 its reverse (55203113), we get a palindrome (86333368).

The spelling of 31130255 in words is "thirty-one million, one hundred thirty thousand, two hundred fifty-five".