31220144304132 has 48 divisors (see below), whose sum is σ = 83268115725312. Its totient is φ = 8918498631840.

The previous prime is 31220144304131. The next prime is 31220144304157. The reversal of 31220144304132 is 23140344102213.

It is a self number, because there is not a number n which added to its sum of digits gives 31220144304132.

It is not an unprimeable number, because it can be changed into a prime (31220144304131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31648794 + ... + 32620337.

It is an arithmetic number, because the mean of its divisors is an integer number (1734752410944).

Almost surely, 2^{31220144304132} is an apocalyptic number.

It is an amenable number.

31220144304132 is an abundant number, since it is smaller than the sum of its proper divisors (52047971421180).

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

31220144304132 is a wasteful number, since it uses less digits than its factorization.

31220144304132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64274928 (or 64274926 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31220144304132 its reverse (23140344102213), we get a palindrome (54360488406345).

The spelling of 31220144304132 in words is "thirty-one trillion, two hundred twenty billion, one hundred forty-four million, three hundred four thousand, one hundred thirty-two".