31122452240 has 160 divisors (see below), whose sum is σ = 80627446656. Its totient is φ = 11076116480.

The previous prime is 31122452213. The next prime is 31122452287. The reversal of 31122452240 is 4225422113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31854632 + ... + 31855608.

Almost surely, 2^31122452240 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 31122452240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40313723328).

31122452240 is an abundant number, since it is smaller than the sum of its proper divisors (49504994416).

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

31122452240 is a wasteful number, since it uses less digits than its factorization.

31122452240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 31122452240 its reverse (4225422113), we get a palindrome (35347874353).

The spelling of 31122452240 in words is "thirty-one billion, one hundred twenty-two million, four hundred fifty-two thousand, two hundred forty".