31251172130 has 8 divisors (see below), whose sum is σ = 56252109852. Its totient is φ = 12500468848.

The previous prime is 31251172129. The next prime is 31251172133. The reversal of 31251172130 is 3127115213.

It can be written as a sum of positive squares in 2 ways, for example, as 30033929809 + 1217242321 = 173303^2 + 34889^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 31251172130.

It is not an unprimeable number, because it can be changed into a prime (31251172133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562558597 + ... + 1562558616.

Almost surely, 2^31251172130 is an apocalyptic number.

31251172130 is a deficient number, since it is larger than the sum of its proper divisors (25000937722).

31251172130 is a wasteful number, since it uses less digits than its factorization.

31251172130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125117220.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 31251172130 its reverse (3127115213), we get a palindrome (34378287343).

The spelling of 31251172130 in words is "thirty-one billion, two hundred fifty-one million, one hundred seventy-two thousand, one hundred thirty".