31404443100 has 144 divisors (see below), whose sum is σ = 92740064256. Its totient is φ = 8203104000.

The previous prime is 31404443093. The next prime is 31404443159. The reversal of 31404443100 is 134440413.

It is a super-2 number, since 2×31404443100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3339405 + ... + 3348795.

It is an arithmetic number, because the mean of its divisors is an integer number (644028224).

Almost surely, 2^31404443100 is an apocalyptic number.

31404443100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31404443100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46370032128).

31404443100 is an abundant number, since it is smaller than the sum of its proper divisors (61335621156).

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

31404443100 is a wasteful number, since it uses less digits than its factorization.

31404443100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9636 (or 9629 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31404443100 its reverse (134440413), we get a palindrome (31538883513).

The spelling of 31404443100 in words is "thirty-one billion, four hundred four million, four hundred forty-three thousand, one hundred".