31144012145240 has 64 divisors (see below), whose sum is σ = 73783452636000. Its totient is φ = 11798530467840.

The previous prime is 31144012145219. The next prime is 31144012145273. The reversal of 31144012145240 is 4254121044113.

It is a super-3 number, since 3×31144012145240³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31144012145197 and 31144012145206.

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 in 15 ways as a sum of consecutive naturals, for example, 3289745 + ... + 8550464.

Almost surely, 2^{31144012145240} is an apocalyptic number.

It is an amenable number.

31144012145240 is an abundant number, since it is smaller than the sum of its proper divisors (42639440490760).

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

31144012145240 is a wasteful number, since it uses less digits than its factorization.

31144012145240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11843700 (or 11843696 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 31144012145240 its reverse (4254121044113), we get a palindrome (35398133189353).

The spelling of 31144012145240 in words is "thirty-one trillion, one hundred forty-four billion, twelve million, one hundred forty-five thousand, two hundred forty".