31440423123352 has 32 divisors (see below), whose sum is σ = 60544470726720. Its totient is φ = 15295236721920.

The previous prime is 31440423123323. The next prime is 31440423123359. The reversal of 31440423123352 is 25332132404413.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440423123359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60251788 + ... + 60771364.

It is an arithmetic number, because the mean of its divisors is an integer number (1892014710210).

Almost surely, 2^{31440423123352} is an apocalyptic number.

It is an amenable number.

31440423123352 is a deficient number, since it is larger than the sum of its proper divisors (29104047603368).

31440423123352 is a wasteful number, since it uses less digits than its factorization.

31440423123352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724051 (or 724047 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 31440423123352 its reverse (25332132404413), we get a palindrome (56772555527765).

The spelling of 31440423123352 in words is "thirty-one trillion, four hundred forty billion, four hundred twenty-three million, one hundred twenty-three thousand, three hundred fifty-two".