31540130 has 16 divisors (see below), whose sum is σ = 59241024. Its totient is φ = 12067440.

The previous prime is 31540123. The next prime is 31540147. The reversal of 31540130 is 3104513.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31540099 and 31540108.

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, 68336 + ... + 68795.

It is an arithmetic number, because the mean of its divisors is an integer number (3702564).

Almost surely, 2^31540130 is an apocalyptic number.

31540130 is a deficient number, since it is larger than the sum of its proper divisors (27700894).

31540130 is a wasteful number, since it uses less digits than its factorization.

31540130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137161.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31540130 is about 5616.0600068019. The cubic root of 31540130 is about 315.9520369976.

Adding to 31540130 its reverse (3104513), we get a palindrome (34644643).

The spelling of 31540130 in words is "thirty-one million, five hundred forty thousand, one hundred thirty".