31303103100 has 36 divisors (see below), whose sum is σ = 90570312504. Its totient is φ = 8347494080.

The previous prime is 31303103099. The next prime is 31303103113. The reversal of 31303103100 is 130130313.

It is a super-2 number, since 2×31303103100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31303103100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52171539 + ... + 52172138.

It is an arithmetic number, because the mean of its divisors is an integer number (2515842014).

Almost surely, 2^31303103100 is an apocalyptic number.

31303103100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31303103100 is an abundant number, since it is smaller than the sum of its proper divisors (59267209404).

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

31303103100 is a wasteful number, since it uses less digits than its factorization.

31303103100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104343694 (or 104343687 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 15.

Adding to 31303103100 its reverse (130130313), we get a palindrome (31433233413).

The spelling of 31303103100 in words is "thirty-one billion, three hundred three million, one hundred three thousand, one hundred".