31031130102 has 64 divisors (see below), whose sum is σ = 71958689280. Its totient is φ = 8737438464.

The previous prime is 31031130083. The next prime is 31031130121. The reversal of 31031130102 is 20103113013.

It is an interprime number because it is at equal distance from previous prime (31031130083) and next prime (31031130121).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4574149 + ... + 4580927.

It is an arithmetic number, because the mean of its divisors is an integer number (1124354520).

Almost surely, 2^31031130102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31031130102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35979344640).

31031130102 is an abundant number, since it is smaller than the sum of its proper divisors (40927559178).

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

31031130102 is a wasteful number, since it uses less digits than its factorization.

31031130102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31031130102 its reverse (20103113013), we get a palindrome (51134243115).

The spelling of 31031130102 in words is "thirty-one billion, thirty-one million, one hundred thirty thousand, one hundred two".