212140303440 has 160 divisors (see below), whose sum is σ = 712180667520. Its totient is φ = 51927287808.

The previous prime is 212140303429. The next prime is 212140303469. The reversal of 212140303440 is 44303041212.

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 212140303440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368554 + ... + 748406.

It is an arithmetic number, because the mean of its divisors is an integer number (4451129172).

Almost surely, 2^212140303440 is an apocalyptic number.

212140303440 is a gapful number since it is divisible by the number (20) 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 212140303440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356090333760).

212140303440 is an abundant number, since it is smaller than the sum of its proper divisors (500040364080).

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

212140303440 is a wasteful number, since it uses less digits than its factorization.

212140303440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380061 (or 380055 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 212140303440 its reverse (44303041212), we get a palindrome (256443344652).

The spelling of 212140303440 in words is "two hundred twelve billion, one hundred forty million, three hundred three thousand, four hundred forty".