31220431541404 has 96 divisors (see below), whose sum is σ = 66702253363200. Its totient is φ = 12497455111680.

The previous prime is 31220431541389. The next prime is 31220431541557. The reversal of 31220431541404 is 40414513402213.

It is a self number, because there is not a number n which added to its sum of digits gives 31220431541404.

It is a congruent number.

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, 68467147 + ... + 68921629.

It is an arithmetic number, because the mean of its divisors is an integer number (694815139200).

Almost surely, 2^{31220431541404} 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 31220431541404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33351126681600).

31220431541404 is an abundant number, since it is smaller than the sum of its proper divisors (35481821821796).

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

31220431541404 is a wasteful number, since it uses less digits than its factorization.

31220431541404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457283 (or 457281 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 31220431541404 its reverse (40414513402213), we get a palindrome (71634944943617).

The spelling of 31220431541404 in words is "thirty-one trillion, two hundred twenty billion, four hundred thirty-one million, five hundred forty-one thousand, four hundred four".