31122214040 has 64 divisors (see below), whose sum is σ = 71965692000. Its totient is φ = 12104322048.

The previous prime is 31122214009. The next prime is 31122214063. The reversal of 31122214040 is 4041222113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2508332 + ... + 2520708.

Almost surely, 2^31122214040 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 31122214040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35982846000).

31122214040 is an abundant number, since it is smaller than the sum of its proper divisors (40843477960).

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

31122214040 is a wasteful number, since it uses less digits than its factorization.

31122214040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14124 (or 14120 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31122214040 its reverse (4041222113), we get a palindrome (35163436153).

The spelling of 31122214040 in words is "thirty-one billion, one hundred twenty-two million, two hundred fourteen thousand, forty".