31220431144312 has 32 divisors (see below), whose sum is σ = 58644462689280. Its totient is φ = 15581931815520.

The previous prime is 31220431144303. The next prime is 31220431144333. The reversal of 31220431144312 is 21344113402213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8888883 + ... + 11893405.

It is an arithmetic number, because the mean of its divisors is an integer number (1832639459040).

Almost surely, 2^{31220431144312} is an apocalyptic number.

It is an amenable number.

31220431144312 is a deficient number, since it is larger than the sum of its proper divisors (27424031544968).

31220431144312 is a wasteful number, since it uses less digits than its factorization.

31220431144312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006883 (or 3006879 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 31220431144312 its reverse (21344113402213), we get a palindrome (52564544546525).

The spelling of 31220431144312 in words is "thirty-one trillion, two hundred twenty billion, four hundred thirty-one million, one hundred forty-four thousand, three hundred twelve".