31201010442 has 96 divisors (see below), whose sum is σ = 80739090432. Its totient is φ = 8521928352.

The previous prime is 31201010437. The next prime is 31201010443. The reversal of 31201010442 is 24401010213.

31201010442 is a `hidden beast` number, since 3 + 120 + 101 + 0 + 442 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31201010443) 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 in 47 ways as a sum of consecutive naturals, for example, 193383 + ... + 315909.

It is an arithmetic number, because the mean of its divisors is an integer number (841032192).

Almost surely, 2^31201010442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31201010442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40369545216).

31201010442 is an abundant number, since it is smaller than the sum of its proper divisors (49538079990).

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

31201010442 is a wasteful number, since it uses less digits than its factorization.

31201010442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122632 (or 122629 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31201010442 its reverse (24401010213), we get a palindrome (55602020655).

The spelling of 31201010442 in words is "thirty-one billion, two hundred one million, ten thousand, four hundred forty-two".