31242251325444 has 96 divisors (see below), whose sum is σ = 77973690203136. Its totient is φ = 9701616844800.

The previous prime is 31242251325431. The next prime is 31242251325469. The reversal of 31242251325444 is 44452315224213.

It is a junction number, because it is equal to n+sod(n) for n = 31242251325396 and 31242251325405.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71008717 + ... + 71447339.

It is an arithmetic number, because the mean of its divisors is an integer number (812225939616).

Almost surely, 2^{31242251325444} is an apocalyptic number.

31242251325444 is a gapful number since it is divisible by the number (34) 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 31242251325444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38986845101568).

31242251325444 is an abundant number, since it is smaller than the sum of its proper divisors (46731438877692).

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

31242251325444 is a wasteful number, since it uses less digits than its factorization.

31242251325444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442205 (or 442203 counting only the distinct ones).

The product of its digits is 921600, while the sum is 42.

Adding to 31242251325444 its reverse (44452315224213), we get a palindrome (75694566549657).

The spelling of 31242251325444 in words is "thirty-one trillion, two hundred forty-two billion, two hundred fifty-one million, three hundred twenty-five thousand, four hundred forty-four".