31130506 has 8 divisors (see below), whose sum is σ = 50940864. Its totient is φ = 14150220.

The previous prime is 31130461. The next prime is 31130507. The reversal of 31130506 is 60503113.

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

It is not an unprimeable number, because it can be changed into a prime (31130507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707490 + ... + 707533.

It is an arithmetic number, because the mean of its divisors is an integer number (6367608).

Almost surely, 2^31130506 is an apocalyptic number.

31130506 is a deficient number, since it is larger than the sum of its proper divisors (19810358).

31130506 is a wasteful number, since it uses less digits than its factorization.

31130506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415036.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 31130506 is about 5579.4718388034. The cubic root of 31130506 is about 314.5782749807.

Adding to 31130506 its reverse (60503113), we get a palindrome (91633619).

The spelling of 31130506 in words is "thirty-one million, one hundred thirty thousand, five hundred six".