31331145032144 has 10 divisors (see below), whose sum is σ = 60704093499810. Its totient is φ = 15665572516064.

The previous prime is 31331145032123. The next prime is 31331145032179. The reversal of 31331145032144 is 44123054113313.

It can be written as a sum of positive squares in only one way, i.e., 29426502144400 + 1904642887744 = 5424620^2 + 1380088^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979098282239 + ... + 979098282270.

It is an arithmetic number, because the mean of its divisors is an integer number (6070409349981).

Almost surely, 2^{31331145032144} is an apocalyptic number.

It is an amenable number.

31331145032144 is a deficient number, since it is larger than the sum of its proper divisors (29372948467666).

31331145032144 is a wasteful number, since it uses less digits than its factorization.

31331145032144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958196564517 (or 1958196564511 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 31331145032144 its reverse (44123054113313), we get a palindrome (75454199145457).

The spelling of 31331145032144 in words is "thirty-one trillion, three hundred thirty-one billion, one hundred forty-five million, thirty-two thousand, one hundred forty-four".