31233222240 has 192 divisors, whose sum is σ = 109354758912. Its totient is φ = 7428761600.

The previous prime is 31233222233. The next prime is 31233222247. The reversal of 31233222240 is 4222233213.

It is an interprime number because it is at equal distance from previous prime (31233222233) and next prime (31233222247).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31233222240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233222247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224035 + ... + 335645.

It is an arithmetic number, because the mean of its divisors is an integer number (569556036).

Almost surely, 2^31233222240 is an apocalyptic number.

31233222240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31233222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54677379456).

31233222240 is an abundant number, since it is smaller than the sum of its proper divisors (78121536672).

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

31233222240 is a wasteful number, since it uses less digits than its factorization.

31233222240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111693 (or 111685 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 31233222240 its reverse (4222233213), we get a palindrome (35455455453).

The spelling of 31233222240 in words is "thirty-one billion, two hundred thirty-three million, two hundred twenty-two thousand, two hundred forty".