31020300100 has 72 divisors (see below), whose sum is σ = 70662227328. Its totient is φ = 11797420800.

The previous prime is 31020300043. The next prime is 31020300131. The reversal of 31020300100 is 100302013.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343720 + ... + 424480.

It is an arithmetic number, because the mean of its divisors is an integer number (981419824).

Almost surely, 2^31020300100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020300100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35331113664).

31020300100 is an abundant number, since it is smaller than the sum of its proper divisors (39641927228).

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

31020300100 is a wasteful number, since it uses less digits than its factorization.

31020300100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80965 (or 80958 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 31020300100 its reverse (100302013), we get a palindrome (31120602113).

The spelling of 31020300100 in words is "thirty-one billion, twenty million, three hundred thousand, one hundred".