31405433051144 has 8 divisors (see below), whose sum is σ = 58885186970910. Its totient is φ = 15702716525568.

The previous prime is 31405433051143. The next prime is 31405433051147. The reversal of 31405433051144 is 44115033450413.

It can be written as a sum of positive squares in only one way, i.e., 27125243076100 + 4280189975044 = 5208190^2 + 2068862^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31405433051098 and 31405433051107.

It is not an unprimeable number, because it can be changed into a prime (31405433051143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1962839565689 + ... + 1962839565704.

Almost surely, 2^{31405433051144} is an apocalyptic number.

It is an amenable number.

31405433051144 is a deficient number, since it is larger than the sum of its proper divisors (27479753919766).

31405433051144 is a wasteful number, since it uses less digits than its factorization.

31405433051144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925679131399 (or 3925679131395 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 31405433051144 in words is "thirty-one trillion, four hundred five billion, four hundred thirty-three million, fifty-one thousand, one hundred forty-four".