31331210130 has 128 divisors (see below), whose sum is σ = 91201593600. Its totient is φ = 7590758400.

The previous prime is 31331210117. The next prime is 31331210143. The reversal of 31331210130 is 3101213313.

It is a happy number.

31331210130 is a `hidden beast` number, since 313 + 312 + 10 + 1 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (31331210117) and next prime (31331210143).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9030036 + ... + 9033504.

It is an arithmetic number, because the mean of its divisors is an integer number (712512450).

Almost surely, 2^31331210130 is an apocalyptic number.

31331210130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31331210130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45600796800).

31331210130 is an abundant number, since it is smaller than the sum of its proper divisors (59870383470).

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

31331210130 is a wasteful number, since it uses less digits than its factorization.

31331210130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6537 (or 6531 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31331210130 its reverse (3101213313), we get a palindrome (34432423443).

The spelling of 31331210130 in words is "thirty-one billion, three hundred thirty-one million, two hundred ten thousand, one hundred thirty".