31421103444 has 96 divisors (see below), whose sum is σ = 83977689600. Its totient is φ = 10152397440.

The previous prime is 31421103443. The next prime is 31421103449. The reversal of 31421103444 is 44430112413.

31421103444 is a `hidden beast` number, since 3 + 1 + 4 + 211 + 0 + 3 + 444 = 666.

It is a super-2 number, since 2×31421103444² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421103443) 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, 1060309 + ... + 1089539.

It is an arithmetic number, because the mean of its divisors is an integer number (874767600).

Almost surely, 2^31421103444 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 31421103444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41988844800).

31421103444 is an abundant number, since it is smaller than the sum of its proper divisors (52556586156).

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

31421103444 is a wasteful number, since it uses less digits than its factorization.

31421103444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29550 (or 29542 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 31421103444 its reverse (44430112413), we get a palindrome (75851215857).

The spelling of 31421103444 in words is "thirty-one billion, four hundred twenty-one million, one hundred three thousand, four hundred forty-four".