31103223102 has 64 divisors (see below), whose sum is σ = 79131686400. Its totient is φ = 8870955840.

The previous prime is 31103223101. The next prime is 31103223131. The reversal of 31103223102 is 20132230113.

31103223102 is a `hidden beast` number, since 31 + 1 + 0 + 322 + 310 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103223101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142777 + ... + 287387.

It is an arithmetic number, because the mean of its divisors is an integer number (1236432600).

Almost surely, 2^31103223102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31103223102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39565843200).

31103223102 is an abundant number, since it is smaller than the sum of its proper divisors (48028463298).

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

31103223102 is a wasteful number, since it uses less digits than its factorization.

31103223102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145198 (or 145192 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31103223102 its reverse (20132230113), we get a palindrome (51235453215).

The spelling of 31103223102 in words is "thirty-one billion, one hundred three million, two hundred twenty-three thousand, one hundred two".