31021243422 has 32 divisors (see below), whose sum is σ = 69719989248. Its totient is φ = 9129997536.

The previous prime is 31021243369. The next prime is 31021243427. The reversal of 31021243422 is 22434212013.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31021243392 and 31021243401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021243427) 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, 8644038 + ... + 8647625.

It is an arithmetic number, because the mean of its divisors is an integer number (2178749664).

Almost surely, 2^31021243422 is an apocalyptic number.

31021243422 is an abundant number, since it is smaller than the sum of its proper divisors (38698745826).

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

31021243422 is a wasteful number, since it uses less digits than its factorization.

31021243422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291704.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31021243422 its reverse (22434212013), we get a palindrome (53455455435).

The spelling of 31021243422 in words is "thirty-one billion, twenty-one million, two hundred forty-three thousand, four hundred twenty-two".