31222311036 has 96 divisors (see below), whose sum is σ = 83884889088. Its totient is φ = 8853857280.

The previous prime is 31222311019. The next prime is 31222311041. The reversal of 31222311036 is 63011322213.

It is a junction number, because it is equal to n+sod(n) for n = 31222310997 and 31222311015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9014241 + ... + 9017703.

It is an arithmetic number, because the mean of its divisors is an integer number (873800928).

Almost surely, 2^31222311036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31222311036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41942444544).

31222311036 is an abundant number, since it is smaller than the sum of its proper divisors (52662578052).

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

31222311036 is a wasteful number, since it uses less digits than its factorization.

31222311036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251 (or 4249 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31222311036 its reverse (63011322213), we get a palindrome (94233633249).

The spelling of 31222311036 in words is "thirty-one billion, two hundred twenty-two million, three hundred eleven thousand, thirty-six".