31222011144040 has 128 divisors (see below), whose sum is σ = 71736947568000. Its totient is φ = 12226235424768.

The previous prime is 31222011144031. The next prime is 31222011144083. The reversal of 31222011144040 is 4044111022213.

It is a junction number, because it is equal to n+sod(n) for n = 31222011143996 and 31222011144014.

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, 572360047 + ... + 572414593.

It is an arithmetic number, because the mean of its divisors is an integer number (560444902875).

Almost surely, 2^{31222011144040} 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 31222011144040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35868473784000).

31222011144040 is an abundant number, since it is smaller than the sum of its proper divisors (40514936423960).

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

31222011144040 is a wasteful number, since it uses less digits than its factorization.

31222011144040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55619 (or 55615 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 31222011144040 its reverse (4044111022213), we get a palindrome (35266122166253).

The spelling of 31222011144040 in words is "thirty-one trillion, two hundred twenty-two billion, eleven million, one hundred forty-four thousand, forty".